Answer:Both maximum height attained and angle of projection
Explanation:
An object has a coefficient of kinetic friction of 0.2 and a normal force of 30N. Find the force of kinetic friction.
Answer:
Force of kinetic friction, Fk = 6N
Explanation:
Given the following data;
Coefficient of kinetic friction, μ = 0.2
Normal force, Fn=30N
To find the Force of kinetic friction;
Mathematically, the force of kinetic friction is given by the formula;
Fk = μFn
Where;
Fk represents the force of kinetic friction. μ represents the coefficient of friction. Fn represents the normal force.Substituting into the equation, we have;
Fk = 0.2*30
Fk = 6N
Therefore, the force of kinetic friction is 6N.
A force that is present between two moving objects or surfaces is called kinetic friction. It is estimated in newtons (N) and is calculated by:
[tex]\rm F_{k} =\rm \mu _{\rm k} F_{n}[/tex]
Where, [tex]\rm F_{k}[/tex] = frictional force, [tex]\mu _{\rm k}[/tex] = coefficient, [tex]\rm F_{n}[/tex] = normal force.
The kinetic friction of the object is 6N.
The kinetic friction can be estimated as:
Given,
Coefficient of kinetic friction ([tex]\mu[/tex]) = 0.2Normal force [tex]\rm F_{n}[/tex] = 30 NSubstituting values in the formula:
[tex]\rm F_{k} =\rm \mu _{\rm k} F_{n}[/tex]
[tex]\begin{aligned}\rm F_{k} &= 0.2 \times 30\\\\\rm F_{k} &= 6 \rm N\end{aligned}[/tex]
Therefore, 6N is the frictional force.
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What is the form of energy that our eyes can detect?
A. Sound Energy
B. Chemical Energy
C. Light Energy
D. Thermal Energy
Answer: C. Light energy.
Explanation:
please help! i need the answers asap!!! 10 points!!!!!
Answer:
Hydrogen and helium
Answer:
1. iron, nickel, calcium, sodium, and magnesium
2. nuclear fusion
Explanation:
I googled it
For a straight line on a position-time graph, the slope of the line represents:
Group of answer choices
velocity
displacement
acceleration
distance
An aeroplane accelerates from rest at a rate
of 25m/s² for 3 s .calculate final velocity
Answer:
The final speed is 75 m/s
Explanation:
Constant Acceleration Motion
It's a type of motion in which the velocity of an object changes uniformly in time.
Being a the constant acceleration, vo the initial speed, vf the final speed, and t the time, the following relation applies:
[tex]v_f=v_o+at[/tex]
The airplane comes from rest (vo=0) accelerating at a=25 m/s^2 for t=3 s.
The final speed is:
[tex]v_f=0+25~m/s^2\cdot 3~s[/tex]
[tex]v_f=75~m/s[/tex]
The final speed is 75 m/s
The diagram below shows four sound waves.
m А.
Wave 1
Wave 2
Wave 3
Wave 4
Which of these shows the waves in the increasing order of their frequencies? (3 points)
Оа
Wave 1, Wave 4, Wave 3, Wave 2
Oь
Wave 2, Wave 1, Wave 3, Wave 4
Ос
Wave 3, Wave 4, Wave 1, Wave 2
Od
Wave 4, Wave 3, Wave 1, Wave 2
Answer: D (Wave 4, Wave 3, Wave 1, Wave 2)
The arrangement of these waves in order of increasing frequency is;Wave 4, Wave 3, Wave 1, Wave 2.
What is a wave?A wave is a disturbance along a medium that transfers energy. We have to note that waves are shown in the manner that is depicted by the images shown in the question.
Now, the arrangement of these waves in order of increasing frequency is;Wave 4, Wave 3, Wave 1, Wave 2.
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Question 2 The gravitational force between two objects with identical masses that are 10 m apart, is 2.67 x10-10 N. To the nearest kg, what is the mass of each object? -11 Nom? Se G= Universal Gravitational Constant = 6.67 x 10 kg? 2 kg O O 10 kg 20 kg O 200 kg
Answer 888990,0 kg
Explanation:
888990,0 kg is the mass of the object.
What is Gravitational force?
Any two mass-containing objects are attracted to one another by the gravitational force. Because it consistently attempts to pull masses together rather than pushing them apart, the gravitational force is known as attractive.
Newton's Universal Law of Gravitation is what it is known as.
Admittedly, you aren't pushing on those other objects all that much because you don't have a very large mass. Additionally, items that are very far apart from one another do not clearly tug on one another.
Therefore, 888990,0 kg is the mass of the object.
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15 POINTS URGENT DUE IN 5 MINUTES :(
please don’t troll.
A. A woman hiked on a trail up a mountainShe slowed down as it became more steep. She stopped at the top to take in the view below. Then she continued on the trail and walked down the other side of the mountain.
B. A truck driver left a warehouse and drove on a highway at a constant speed before he stopped for lunch. To make up for lost time, he drove faster when he got back on the highway. He unloaded his haul and drove quickly back to the warehouse.
C. A woman drove her car up steep bill and stopped at a red lightWhen the light turned green she continued to drive up the rest of the hill until she reached the gas station. She stopped to buy gas and then drove down the other side of the hill towards her office.
D. A man ran in a race and accelerated steadily for the first hour. He then continued briefly at a constant pace while he had the lead. When other runners began to catch up he accelerated againHe then continued at a constant high speed. He became overtired and slowed down until he had to completely stop running.
Answer:
D now go to ur good life :)
Explanation:
Answer:
blah
Explanation:
blah
The diagram below shows the velocity vectors for two cars that are moving relative to each other.
From the frame of reference of car 1, what is the velocity of car 2?
Answer:
The answer is "[tex]5 \ \frac{m}{s} \ west[/tex]"
Explanation:
[tex]\to \vec{V_1} = (25 \frac{m}{s}) (\hat{-i})\\\\\to \vec{V_2} = (20 \frac{m}{s}) (\hat{-i})\\\\[/tex]
velocity of car | respect to car :
[tex]\to \vec{V_{12}} = \vec{V_1} - \vec{V_2}\\\\[/tex]
[tex]=\vec{-25} \hat{i}+ \vec{20} \hat{i}\\\\= 5 \ \frac{m}{s} \ west[/tex]
Answer:
70 m/s east
Explanation:
List and describe the 5 health reaped components of fitness.
Answer:
(1) body composition, (2) flexibility, (3) muscular strength, (4) muscular endurance, and (5) cardiorespiratory endurance.
Physical activity increases your risk for coronary artery disease. true false
Answer:
false here is why :)
Explanation:
Regular, moderate-intensity physical activity reduces the risk of developing coronary heart disease and can reduce the likelihood of dying from heart disease.
hope this helped.
PLEASE help!!
"A gas has an initial pressure of 296 atm, is now at 1246 atm (final pressure) and a final volume of 72 L, what is the initial volume of this gas?"
Answer:
in which standard you are, i am typing your answer till please reply.
A group of athletes are trying to turn a large wheel and axle to move a stone. What can they do to move the wheel with less effort?
with what force will the a car hit a tree if the car has a mass of 3,000 kg and a acceleration of 2m/s^2
Answer:
The answer is 6000 NExplanation:
The force acting on an object given it's mass and acceleration can be found by using the formula
force = mass × acceleration
From the question we have
force = 3000 × 2
We have the final answer as
6000 NHope this helps you
Two blocks, with masses m1= 1.5kg and m2= 2.5kg approach each other
with initial velocities; V1= 2.0 m/s and V2i= 3.0 m/s. The two blocks
collide, in a totally inelastic collision, what is their common final velocity
after collision? *
Answer:
2.625 m/s
Explanation:
This is a momentum question. Momentum is conserved which means that all the starting momentum must be accounted for.
1.5 kg * 2 m/s + 2.5 kg * 3 m's = (1.5 + 2.5)kg * x m/s
3 kg m/s + 7.5 kg m/s = 4 kg * x
10.5 kg m/s = 4 kg x
10.5 / 4 = x
x = 2.625 m/s
inelastic means that after the collision, the masses stick together as though they were one.
Max, who has a mass of 80 kg and his girlfriend, Allison, who has a mass
of 50 kg are wearing skates and are standing together on a frozen lake. If
they push apart and Max has a velocity of 0.72 m/s in the south direction,
then what is the velocity of Allison? (Neglect friction)
Answer:
I don't know but focus on that she ways less so she will have a higher velocity
Diffraction occurs when waves _______ around the edge of a barrier?
Answer:
travels
Explanation:
hope this helps and have a blessed day
Geological and atmospheric changes happening over a ______ time scale can cause______ extinctions.
Fill in the blanks folks..
Answer:
Long short
Explanation:
1
Dogs that are bigger are selected to be parents.
2
The parents are bred together, and their offspring will be different sizes.
3
The biggest offspring will be selected and bred together.
4
This cycle continues until the dogs have been selectively bred to be bigger than the current world record size.
5
Selective breeders need to ensure that they are not also selecting for disadvantageous traits, like genetic limb defects.
Ur gonna need this...
Brainliest plzzz..thanks..sorry Messy
Answer:
Geological and atmospheric changes happening over a long time scale can cause short extinctions.
Explanation:
What is the difference between physical & chemical changes?
Slate whether each is an example of a Physleat (P) or Chemteal (C) property
1. Arock's density
2. boiling point of Gatorade
3. ability of an old car to rust
4. red color of a pe apple
S ability of wood to ignite
8. bitler taste of a lemon
7. melting point of wax
8. hardness of marble
9. Luster (shininess) of gold
boiling point Gatoride
5. Describe the trip from your home to school using the words
position, distance, displacement, and speed.
My commute to school is a constant distance, but the time it takes to get there fluctuates owing to traffic.
What is displacement?If an object moves with respect to a reference frame, such as when a passenger travels to the back of an airliner or a professor moves to the right with respect to a whiteboard, the item's position changes.
This change in location is described as displacement.
My commute to school is a constant distance, but the time it takes to get there fluctuates owing to traffic,
The initial and the final position of the commute is the same, but the displacement varies with the route which affects my car's speed and where it is in line at stop lights.
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A subway car moves at a constant speed of 10 m/s over a period of 10 s. What is the instantaneous speed halfway through this motion
Answer: 10 m/s
We're told the speed is constant, so it's not changing throughout the time period given to us. So throughout the entire interval, the speed is 10 m/s.
HELP ASAP HELP Two tennis balls of the same mass are served at different speeds: 30 m/s and 60 m/s. Which serve has more kinetic energy and by how much? Defend your answer. *
Answer:
The second ball has four times as much kinetic energy as the first ball.
Explanation:
Kinetic Energy
Is the type of energy an object has due to its state of motion. It's proportional to the square of the speed.
The equation for the kinetic energy is:
[tex]\displaystyle K=\frac{1}{2}mv^2[/tex]
Where:
m = mass of the object
v = speed at which the object moves
The kinetic energy is expressed in Joules (J)
Two tennis balls have the same mass m and are served at speeds v1=30 m/s and v2=60 m/s.
The kinetic energy of the first ball is:
[tex]\displaystyle K_1=\frac{1}{2}m\cdot 30^2[/tex]
[tex]\displaystyle K_1=\frac{1}{2}m\cdot 900[/tex]
[tex]K_1=450m[/tex]
The kinetic energy of the second ball is:
[tex]\displaystyle K_2=\frac{1}{2}m\cdot 60^2[/tex]
[tex]\displaystyle K_2=\frac{1}{2}m\cdot 3600[/tex]
[tex]K_2=1800m[/tex]
Being m the same for both balls, the second ball has more kinetic energy than the first ball.
To find out how much, we find the ratio:
[tex]\displaystyle \frac{K_2}{K_1}=\frac{1800m}{450m}[/tex]
Simplifying:
[tex]\displaystyle \frac{K_2}{K_1}=4[/tex]
The second ball has four times as much kinetic energy as the first ball.
Answer:
he second ball has four X as much kinetic energy as the first ball
Explain:
Kinetic Energy Is the type of energy an object has due to its state of motion. It's proportional to the square of the speed
m/the mass of the object
v/the speed at which the object moves
The kinetic energy is expressed in Joules (J)
Two tennis balls have the same mass m and are served at speeds v1=30 m/s and v2=60 m/s.
Being m the same for both balls, the second ball has more kinetic energy than the first ball. So there for The second ball has four times as much kinetic energy as the first ball.
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what are some advantages of gravitational energy
Answer:
Explanation: Gravity keeps our bones and bodily muscles from not working, things like dams can be one example of gravitational energy being used for our benefits. Without gravitational energy, our earth most likely won't stay in it's own atmosphere. Another example is like a car on the top of the hill, or a snow pack (Where an avalanche might happen)
Importance of measurement
Answer:
Without the ability to measure, it would be difficult for scientists to conduct experiments or form theories. Not only is measurement important in science and the chemical industry, but it is also essential in farming, engineering, construction, manufacturing, commerce, and numerous other occupations and activities.
Explanation:
Make sure to edit so you're not copy-writed and if this was helpful could I please get brain-list
A pumpkin is thrown horizontally off of a building at a speed of 2.5 m/s and travels a horizontal distance of 12 m before hitting the ground.
What was the initial height of the pumpkin?
What was the final vertical velocity of the pumpkin?
Answer:
-47.04
Explanation:
Divide 12 m by 2.5 m/s which equals 4.8s
And then use 4.8s to multiply it with -9.8
4.8(-9.8)= -47.04 m/s
Hope this helped!! :)
The initial height of the pumpkin is 23.52m and the final vertical velocity of the pumpkin is 47.04 m/s.
Laws of motion:Initial horizontal speed, u = 2.5 m/s
horizontal distance covered , d = 12m
So the time taken is:
t = d/u
t = 12/2.5 s
t = 4.8s
Now, the initial vertical speed, v = 0
So the vertical distance traveled by the pumpkin will be equal to the initial height of the pumpkin:
s = vt + ¹/₂gt²
s = 0.5 × 9.8 × 4.8 m
s = 23.52m
Final vertical velocity:
v' = v + gt
v' = 9.8 × 4.8 m/s
v' = 47.04 m/s
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What effect will the following have on the inertia of a body if
(i) the force acting on it is increased.
(ii) the mass of the body is reduced.
Explanation:
Inertia is the tendency of a body to remain at rest or to do nothing.
It is the resistance to any change in position of body.
When the force on a body increases, the inertia reduces
When the mass is reduced the inertia reduces
According to newton's first law or the law of inertia "an object will remain in its state of rest or of uniform motion unless if it is acted upon by an external force".
A runner is training and runs past meter mark 65 and starts a stopwatch. After the runner passes meter mark 15 the stopwatch stops at 8 seconds. What was the runners velocity?
Question 5 options:
-6.25 m/s
6.25 m/s
8.13 m/s
-1.88 m/s
Answer:
-6.25 m/s
Explanation:
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I need help asappp!!! Help b trcrcrhhvvcc
Answer:
the answer is c. hope this help you out
10. A golf ball is propelled with an initial velocity of 60
meters per second at 37° above the horizontal. The
horizontal component of the golf ball's initial veloc-
ity is
the horizontal component of the golf ball's initial velocity is 47.92 m/s.
The given parameters;
initial velocity of the golf, v = 60 m/s
angle of projection of the golf, Ф = 37°
The horizontal component of the golf ball's initial velocity is calculated as follows;
[tex]v_0_x = v\times cos(\theta)\\\\[/tex]
[tex]v_0_x[/tex] = 60 m/s x cos (37)
[tex]v_0_x[/tex] = 60 m/s x 0.7986
[tex]v_0_x[/tex] = 47.92 m/s
Thus, the horizontal component of the golf ball's initial velocity is 47.92 m/s.
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