WorksheetsUnit 4 Summary
Total questions: 56
Worksheet time: 56mins
Static friction applies to moving objects and kinetic friction applies to non-moving objects.
True
False
Generally speaking, static friction is stronger than kinetic friction.
True
False
If the object is not moving and then the force applied is 6 N, what will happen?
The block will not move
The block will move at a constant velocity
The block will move and continue to speed up
The block will move, speed up, then slow down
If the object is not moving and then the force applied is 5 N, what will happen?
The block will not move
The block will move at a constant velocity
The block will move and continue to speed up
The block will move, speed up, then slow down
If the object is moving and then the force applied is 5 N, what is the net force?
0 N
1 N to the right
1 N to the left
5 N to the right
If the object is moving and then the force applied is 3 N, what is the net force?
0 N
1 N to the right
1 N to the left
5 N to the right
If the object is not moving and then the force applied is 7 N, after 1 second, what is the net force?
0 N
1 N to the right
3 N to the right
7 N to the right
If the object is moving and then the force applied is 5 N, what will happen?
The block will immediately stop moving
The block will move at a constant velocity
The block will move and speed up
The block will move, but slow down
If the object is moving and then the force applied is 4 N, what will happen?
The block will immediately stop moving
The block will move at a constant velocity
The block will move and speed up
The block will move, but slow down
If the object is moving and then the force applied is 3 N, what will happen?
The block will immediately stop moving
The block will move at a constant velocity
The block will move and speed up
The block will move, but slow down
An object on a floor has a maximum static friction of 50 N and a kinetic friction of 40 N.
If the block is not moving and then is pulled with a force of 30 N, will it move?
Yes
No
An object on a floor has a maximum static friction of 50 N and a kinetic friction of 40 N.
If the block is not moving and then is pulled with a force of 45 N, will it move?
Yes
No
An object on a floor has a maximum static friction of 50 N and a kinetic friction of 40 N.
If the block is not moving and then is pulled with a force of 50 N, will it move?
Yes
No
An object on a floor has a maximum static friction of 50 N and a kinetic friction of 40 N.
If the block is not moving and then is pulled with a force of 55 N, will it move?
Yes
No
An object on a floor has a maximum static friction of 50 N and a kinetic friction of 40 N.
If the block is not moving and then is pulled with a force of 30 N, how strong is the friction?
0 N
30 N
40 N
50 N
An object on a floor has a maximum static friction of 50 N and a kinetic friction of 40 N.
If the block is not moving and then is pulled with a force of 30 N, which kind of friction is resisting the pull?
Static friction
Kinetic friction
An object on a floor has a maximum static friction of 50 N and a kinetic friction of 40 N.
If the block is not moving and then is pulled with a force of 45 N, how strong is the friction?
0 N
40 N
45 N
50 N
An object on a floor has a maximum static friction of 50 N and a kinetic friction of 40 N.
If the block is not moving and then is pulled with a force of 45 N, which kind of friction is resisting the pull?
Static friction
Kinetic friction
An object on a floor has a maximum static friction of 50 N and a kinetic friction of 40 N.
If the block is not moving and then is pulled with a force of 50 N, how strong is the friction?
0 N
40 N
45 N
50 N
An object on a floor has a maximum static friction of 50 N and a kinetic friction of 40 N.
If the block is not moving and then is pulled with a force of 55 N, how strong is the friction?
0 N
40 N
50 N
55 N
An object on a floor has a maximum static friction of 50 N and a kinetic friction of 40 N.
If the block is moving and then is pulled with a force of 30 N, how strong is the friction?
0 N
30 N
40 N
50 N
An object on a floor has a maximum static friction of 50 N and a kinetic friction of 40 N.
If the block is moving and then is pulled with a force of 30 N, what happens to the speed of the block?
It will speed up in the direction that it is being pulled
It will slow down in the direction that it is being pulled
It will continue at a constant speed in the direction that it is being pulled
An object on a floor has a maximum static friction of 50 N and a kinetic friction of 40 N.
If the block is moving and then is pulled with a force of 40 N, how strong is the friction?
0 N
30 N
40 N
50 N
An object on a floor has a maximum static friction of 50 N and a kinetic friction of 40 N.
If the block is moving and then is pulled with a force of 40 N, what happens to the speed of the block?
It will speed up in the direction that it is being pulled
It will slow down in the direction that it is being pulled
It will continue at a constant speed in the direction that it is being pulled
An object on a floor has a maximum static friction of 50 N and a kinetic friction of 40 N.
If the block is moving and then is pulled with a force of 45 N, how strong is the friction?
0 N
40 N
45 N
50 N
An object on a floor has a maximum static friction of 50 N and a kinetic friction of 40 N.
If the block is moving and then is pulled with a force of 45 N, what happens to the speed of the block?
It will speed up in the direction that it is being pulled
It will slow down in the direction that it is being pulled
It will continue at a constant speed in the direction that it is being pulled
An object on a floor has a maximum static friction of 50 N and a kinetic friction of 40 N.
If more weight was added on top of the block, what would happen to the values for friction?
The friction values would both increase
Max static friction would increase but kinetic friction would not change
Kinetic friction would increase but max static friction would not change
Neither friction values would change
In most cases, kinetic friction is stronger than static friction.
True
False
Which friction applies when you are walking and your feet don't slip?
Kinetic friction
Static friction
Neither because there's no friction involved in walking
An object on a floor has a maximum static friction of 50 N and a kinetic friction of 40 N.
If the block is moving and then is pulled with a force of 30 N, which kind of friction is opposing the motion of the block?
Static friction
Kinetic friction
The arrows show the direction of a pushing force. Which arrow shows the pushing direction that will require the least amount of force to move the car?
Arrow A
Arrow B
Arrow C
They are all the same
A load of 100 newtons is lifted with this pulley setup. Assuming no friction, how much force is needed to do the lifting?
50
100
200
400
An effort of 200 newtons is applied to this pulley setup. How many newtons of lifting force will it produce?
50
100
200
400
A load of 100 newtons is lifted with this pulley setup. Assuming no friction, how much force is needed to do the lifting?
50
100
200
400
An effort of 200 newtons is applied to this pulley setup. How many newtons of lifting force will it produce?
50
100
200
400
An effort of 100 newtons is applied to this pulley setup. How many newtons of lifting force will it produce? (Ignore the 300 kg in the picture)
less than 100 N
300 N
500 N
600 N
A load of 600 newtons is lifted with this pulley setup. Assuming no friction, how much force is needed to do the lifting?
100 N
300 N
600 N
6 x 600 N = 3600 N
A load of 30 newtons is lifted with this pulley setup. Assuming no friction, how much force is needed to do the lifting?
15 N
30 N
60 N
120 N
A backpack is hung to keep it away from bears. Which arrangement would require the least tension (force) in the rope?
Arrangement X
Arrangement Y
Arrangement Z
They are all the same because they all have the same backpack.
A backpack is hung to keep it away from bears. Which arrangement would require the strongest rope?
Arrangement X
Arrangement Y
Arrangement Z
They are all the same because they all have the same backpack.
A loaded dog sled is stranded because the dogs ran off. Which arrangement will require the least force from the two people pulling it? (shown from above)
Since it is the same sled each time all the arrangements are equal.
When a falling object stops accelerating because of air resistance and falls at a constant speed, it has reached ____.
hyperspeed
escape velocity
disequilibrium
terminal velocity
A force which causes objects to fall is
weight
gravity
air resistance
buoyancy
What is a parachute designed to maximize?
Gravity
Air Pressure
Air Resistance
Thrust
A hammer is dropped on Earth and the Moon. If gravitational pull on the Moon is about 1/6 of that on Earth, where does a hammer fall faster?
Moon
Earth
No difference
Depends on the mass of the hammer
When a person is falling from a high-flying airplane, what will happen to the person's velocity?
It will increase with no limit
It will increase then decrease
It will increase then become pretty constant
It will stay the same the whole time
When a person is falling from a high-flying airplane, what will happen to the person's acceleration?
It will increase with no limit
It will decrease down to zero
It will increase then become pretty constant
It will stay the same the whole time
The graph describes the speed of a falling object. What probably happened at 2 seconds?
At 2 seconds the atmosphere was changed into a vacuum
At 2 seconds a parachute opened
At 2 seconds the object hit the ground and stopped
At 2 seconds the object stopped going up, and started falling down
A bowling ball and a bag of potato chips are dropped at the same time from a tall tower on Earth. What happens?
Both speed up but the bag of chips is affected by the air resistance more so the bowling ball hits the ground first.
Both speed up but the bowling ball is affected by the air resistance more so the bag of chips hits the ground first.
Both speed up at the same rate and both hit the ground at the same time.
A bowling ball and a bag of potato chips are dropped at the same time from a tall tower on the Moon. There is no air on the Moon. What happens?
Both speed up but the bag of chips is not as heavy so the bowling ball hits the ground first.
Both speed up but the bowling ball has more inertia (resistance to the pull of gravity) so the bag of chips hits the ground first.
Both hit the surface at the same time because light and heavy objects fall at the same speed when there is no air resistance.
A feather and a bowling ball are dropped from the same height in a room with air. Which object lands first?
The feather
The bowling ball
Both land at the same time
A feather and a bowling ball are dropped from the same height in a room with no air. Which object lands first?
The feather
The bowling ball
Both land at the same time
The don't fall
When an object is falling through the air there is a force on the object from the collisions with the air. What direction is that force on the object?
Upward
Downward
Inward
Outward
When a falling object has reached terminal velocity, the force of air resistance equals _____.
the object's weight
the object's mass
the frictional force
the buoyant force
The faster an object goes through the air, the less air resistance it experiences.
True
False
Which statement is true?
Objects with more mass (and inertia) are less affected by the force of air resistance.
Objects with less mass (and inertia) are less affected by the force of air resistance.
Objects with more mass (and inertia) are more affected by the force of air resistance.
All the other statements are false.
