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Worksheets2022 Physics Midterms
Total questions: 58
Worksheet time: 14hrs 16mins
When a person is riding on an elevator that is accelerating downward, the normal force supporting them is less than their weight
True
False
You give a chair a shove, causing it to slide horizontally across the floor. The chair leaves your hands and then slides to a stop. While it is sliding to a stop, which of the following forces could you include in a free body diagram of the chair?
Only normal force and gravity and no other forces
Force of static friction
Force of kinetic friction
Applied force in the direction of motion
If you are pushing a chair horizontally at a constant velocity across the floor, then the force of your push is equal to the force of friction.
True
False
If two people start out 5 meters apart and move to 20 meters apart, BUT at the same time the first person DOUBLES his mass, what happens to the gravitational force between them?
It becomes half as large
It becomes one fourth as large
It becomes one eighth as large
It remains the same
Some people used to think that a rocket could not travel to the moon because it would have no air to push against once it left Earth’s atmosphere. We now know that idea was mistaken. What force propels a rocket when it is in a vacuum?
The inertia of the rocket moving forward
The force of the burning exhaust pushing on the rocket
The force on the rocket from the ground
The force of gravity
A 60 kg student is standing on a bathroom scale in an elevator. If the scale reads 690 N, the net force on the student is
90N downwards
690N downwards
90N upwards
690N upwards
0N
If you are in the space shuttle, which is orbiting around the Earth, you feel “weightless”. Why is that?
Because the force of gravity on you is very small
Because there is no force of gravity acting on you
Because there is no normal force acting on you, since you and everything in the shuttle are falling at the same rate
Because the force from the moon cancels out most of the force from the earth
Because of your mother
If an object has a net force on it to the right, it must be moving to the right
True
False
A student is exerting a constant force to the right on a cart of books moving down a frictionless hallway. What does the cart of books do?
The cart will move at a constant acceleration, but you can’t tell which direction it is moving.
The cart will move at a constant acceleration, with its motion to the right
The cart will move at a constant velocity, but you can’t tell which direction it is moving
it t-poses
A 60 kg box has a coefficient of static friction of 0.79. Will the box move when it is pushed horizontally with a force of 300 N?
Yes
No
Not enough information
The force of gravity between two objects is 88 N. What would the force of gravity be if the distance between those two objects tripled?
9.8N
29.3N
264
792
What has a greater effect on the force of gravity between two objects: doubling the mass of one of the objects or cutting the distance between the objects in half?
Both changes have the same effect
Doubling the mass of one object
Halving the distance between the objects
The amount of friction force generated between two moving objects will change based on the amount of horizontal force applied to keep the objects moving.
True
False
If you place a book on a table, and then push down on it, which of the following statements is true?
FN = Fg
FN<Fg
FN>Fg
You can’t tell which force is bigger, without knowing the mass of the book and how hard you are pushing
If a car pulls a trailer and moves forward, what force actually pushes the car forward?
The normal force
The car's engine
The trailer pushing the car forward
The force of the road on the car
The coefficient of static friction for two surfaces in contact will always be greater than the coefficient of kinetic friction for the same two surfaces
True
False
As a harvester collects corn, it deposits it into a trailer pulled by a tractor. The tractor's engine provides the force necessary to accelerate the trailer. As the mass of the trailer increases, how does the force provided by the engine have to change in order for the tractor to have the same acceleration?
The force generated by the engine must increase
The force generated by the engine must decrease
The force generated by the engine must stay the same
What is the mass of the object represented by this net force vs acceleration graph?
3kg
6kg
10kg
30kg
The unit for the coefficient of friction is Newtons
True
False
Jupiter and the Sun are affected by each other's gravity. Which of the following statements about these objects' gravity is true?
The Sun pulls on Jupiter with a greater force due to its larger mass
The Sun pulls on Jupiter with a greater force because it is in the center of the solar system
Jupiter pulls on the Sun with a greater force due to its smaller radius
Both objects pull on each other with the same force of gravity
Your teacher challenges you and your best friend to each pull on a pair of force scales attached to the ends of a horizontal rope, in tug-of-war fashion, so that the readings on the scales will differ. Can this be done?
Yes, because one student will be stronger than the other
Yes, because one student will have more mass than the other
No, because the two students will always have equal and opposite forces on each other
If a car pulls a trailer and accelerates forward, which is greater, the force of the car on the trailer or the trailer on the car?
The force of the trailer on the car, which is why the car must accelerate
The force of the car on the trailer, which is why it moves forward
They are equal and opposite
A box sits at rest on a table. The box is pushed gently at first and does not move, so the force of the push is increased gradually. When the force on the box is 63 N, the box just begins to move. What additional information is helpful for calculating the coefficient of static friction between the box and the table?
The force of static friction on the box
The material that the box is made of
The acceleration of the box once it starts to move
Either the weight or the mass of the box
When a ball rolls horizontally off a table and is falling to the floor, which of the following quantities are constant? (check ALL that apply)
Horizontal velocity
Vertical velocity
Horizontal acceleration
Vertical acceleration
None of the options- they are all increasing as the ball falls
When a ball rolls horizontally off a table, which of the following quantities determine how long it takes the ball to reach the floor? (check ALL that apply)
The horizontal velocity at which the ball leaves the table
The acceleration due to gravity
The height of the table
The mass of the ball
A plane takes off and flies into the air with a constant velocity of 120 m/s at an angle of 22 degrees above the horizontal. What is the vertical component of the plane’s velocity?
0 m/s
45 m/s
48.5 m/s
111 m/s
A cannonball is fired horizontally off of a cliff. Which of the following v vs t graphs represent its motion in the HORIZONTAL direction as it falls to earth?
A
B
C
D
A volleyball is bumped from one side of the court up over the net and down to the other side of the court. What is true when the ball reaches its maximum height? (check ALL that apply)
the vertical velocity is zero
the vertical acceleration is zero
the horizontal velocity is zero
the horizontal acceleration is zero
the displacement is zero
You throw a ball up in the air with a launch velocity of 30 m/s at a given angle above the horizontal. It takes 4 seconds to go up and land back down at the same height you threw it at. After 3 seconds what is the ball doing? (Check ALL that apply.)
Its total velocity is greater than 30 m/s
Its total velocity is less than 30 m/s
It’s on its way down
It’s on its way up
A cannonball is fired horizontally off of a cliff. Which of the following v vs t graphs represents its motion in the VERTICAL direction as it falls to earth?
A
B
C
D
A bullet is fired horizontally and at the exact same time a bullet is dropped from the same height. Which bullet will hit the ground first?
The bullet fired horizontally
The bullet that was dropped
They hit at the same time
You can’t tell without knowing how fast the bullet is fired
If you throw a rock horizontally off of a cliff at 8 m/s, what is its horizontal velocity 1.75 seconds later (ignoring air resistance)?
8 m/s
-8 m/s
-17.5 m/s
-25.5 m/s
When they hit the ground, which pumpkin (or pumpkins) has the greatest vertical velocity?
Sandy’s
Peter’s
Mark’s
Peter’s & Mark’s
Which pumpkin hits the ground first?
Peter's
Sandy's
Mark's
Sandy's and Peter's
After 1 second, which pumpkin (or pumpkins) has the greatest vertical velocity?
Sandy's
Peter's
Peter's and Mark's
Peter's and Sandy's
The slope of a POSITION vs TIME graph is...
displacement
velocity
acceleration
none of the above
the slope of a VELOCITY vs TIME graph is...
displacement
velocity
acceleration
none of the above
A car is speeding up while traveling in the negative direction. Which of the following statements is true?
The velocity is negative and the acceleration is negative.
The velocity is negative and the acceleration is positive.
The velocity is positive and the acceleration is negative.
The velocity is positive and the acceleration is positive.
Which of the following velocity vs. time graphs shows the same motion as the position vs. time graph?
A
B
C
D
Which of the following velocity vs. time graphs shows the same motion as the position vs. time graph?
A
B
C
D
Which of the following velocity vs. time graphs shows the same motion as the position vs. time graph?
A
B
C
D
A car is slowing down while traveling in the negative direction. Which of the following statements is true?
The velocity is negative and the acceleration is positive
The velocity is positive and the acceleration is positive
The velocity is negative and the acceleration is negative.
The velocity is positive and the acceleration is negative.
When an object is dropped off a cliff and is falling to the ground, which of the following quantities is constant?
displacement
time
velocity
acceleration
none of these --- they are all increasing as the object falls
From point B to C, the kid is... (choose all that apply)
speeding up.
slowing down
moving forwards.
moving backwards.
stopped
From point F to G, the kid is... (choose all that apply)
speeding up.
slowing down.
moving backwards
moving forwards.
stopped
A 1 kg rock and a 10 kg rock are dropped off a cliff. Neglecting air resistance, which would hit the ground first?
The 1 kg rock.
The 10 kg rock.
They will both hit at the same time.
There isn't enough information to solve this question.
A ball is tossed straight up, reaches a peak height, and then falls back down to the height at which it was first released. Which of the following statements about the motion of the ball are true?
A is correct.
A and B are correct.
A, B, and C are correct.
All of the above are correct.
During which segment(s), even partially, did the elephant stop moving? (choose all that apply)
B to C
C to D
E to F
None of the above
During which segment(s), even partially, did the elephant slow down while moving backward? (choose all that apply)
A to B
B to C
D to E
F to G
A baseball is thrown upwards at 20 m/s and falls back to earth. At the very highest point, which of the following statements is true?
Both its acceleration and velocity are negative.
Its velocity is zero and its acceleration is negative.
Its velocity is zero and its acceleration is zero.
Its velocity is negative and its acceleration is zero.
A ball is tossed straight up, reaches a peak height, and then falls back down. Which of the following statements about gravity's effect on the ball is true?
Only B is correct
A and B are correct
B and D are correct
B and C are correct
C and D are correct
The graph below shows the Position vs Time graph for two bicycles. Which one is moving faster?
A
B
They are both moving with the same velocity
Cannot determine from the graph
Tom’s friend lives 100 meters away from Tom’s house. Tom walks 100 meters to his friend’s house, then turns around and walks back 35 meters to pick up his phone that he dropped. Then he continues on, stopping at his friend’s house. What is the total 𝙙𝙞𝙨𝙩𝙖𝙣𝙘𝙚 that he traveled?
-100 meters
100 meters
135 meters
170 meters
The slope of the line on a position vs time graph describes what quantity?
acceleration
velocity
displacement
position
Tom’s friend lives 100 meters away from Tom’s house. Tom walks 100 meters to his friend’s house, then turns around and walks back 35 meters to pick up his phone that he dropped. Then he continues on, stopping at his friend’s house. What is Tom's 𝙙𝙞𝙨𝙥𝙡𝙖𝙘𝙚𝙢𝙚𝙣𝙩 at the moment he is picking up the phone?
35 meters
65 meters
100 meters
135 meters
At what time does the dog turn around?
1 s
2 s
4 s
5 s
The dog never turns around.
Peter walked 2 miles to Sandy’s house from his house to return her calculator, and then returned right back to his house. It took him 1 hour to make the entire trip. What was the magnitude of his average velocity?
0 miles/hr
1 miles/hr
2 miles/hr
4 miles/hr
Which of the following measurements is a vector?
speed
mass
displacement
time
