Which way do we go?
Move this.
Be strong in mind and spirit.
Everything and Nothing.
I'm too tired!
100
The diameter of an automobile tire is closest to
A. 10-2 m
B. 100 m
C. 101 m
D. 102 m
What is B.
100
When you drop a ball it accelerates downward at 9.8 m/s2. If you instead throw it downward, then its acceleration immediately after leaving your hand, assuming no air resistance, is
A. 9.8 m/s2.
B. more than 9.8 m/s2.
C. less than 9.8 m/s2.
D. Cannot say, unless the speed of throw is given.
What is A
100
In the absence of air resistance, a ball of mass m is tossed upward to reach a height of 20 m. At the 10-m position, half way up, the net force on the ball is
A. 2mg
B. mg
C. mg/2
D. mg/4
What is B
100
You are on a car that makes a right turn just after you throw a ball straight up. While the ball is in the air it moves left, relative to you because
A. the centripetal force pushes it to the left to the left
B. the centripetal force pushes it to the right
C. the centripetal force pushes you to your left to your left
D. the centripetal force pushes you to your right
What is D
100
When an increase in speed doubles the momentum of a moving body, its kinetic energy
A. increases, but less than doubles
B. doubles
C. more than doubles
D. depends on factors not stated
What is C
200
Which has the most inertia?
A. a 60 kg guy running 10 m/s
B. a 55 kg girl skiing at a speed of 30 m/s
C. a 65 kg teacher standing in front of the class pretending to teach
D. a 70 kg student sitting, pretending to learn
What is D
200
A ball dropped from rest falls freely until it hits the ground with a speed of 20 meters per second. The time during which the ball is in free fall is approximately
A. 1 s
B. 2 s
C. 0.5 s
D. 10 s
What is B
200
A karate chop delivers a force of 3000 N to a board that breaks. The force that the board exerts on the hand during this event is
A. less than 3000 N.
B. 3000 N.
C. greater than 3000 N.
D. Need more information.
What is B
200
The work done in accelerating an object along a frictionless horizontal surface is equal to the change in the object’s
A. momentum
B. velocity
C. potential energy
D. kinetic energy
What is D.
200
The speed of a toy car triples. What happens to its kinetic energy?
A. it also triples B. it decreases to one ninth of its original value
C. it increases nine times its original value
D. it turns into potential energy
What is C.
300
It takes all of Albert and Susan's strength to push a grand piano. If it takes 1200 N to move the piano and Albert can push with no more than 800 N, then with what maximum force can Susan push?
A. 400 N
B. 2000 N
C. 1200 N
D. 800 N
E. All of the above are possible answers
What is E.
300
A heavy rock and a light rock in free fall (zero air resistance) have the same acceleration. The reason the heavy rock doesn’t have a greater acceleration is that the
A. force due to gravity is the same on each.
B. inertia of both rocks is the same.
C. ratio of force to mass is the same.
D. None of these.
What is C
300
A light math book and a heavy physics book are tied together with a length of string. With the string taut, one book is pushed off the edge of a table. As it falls, the other book is dragged horizontally across the table surface. With no friction, acceleration of the books is
A. zero
B. g/2
C. g
D. a value between zero and g
E. a value that could be greater than g
What is D
300
Imagine you're standing on the surface of a shrinking planet. If it shrinks to one-tenth its original diameter with no change in mass, on the shrunken surface you'd weigh
A. 1/100 as much
B. 10 times as much
C. 100 times as much
D. 1000 times as much
E. None of these.
What is C
300
A block slides across a rough, horizontal tabletop. As the block comes to rest, there is an increase in the block-tabletop system’s
A. gravitational potential energy
B. elastic potential energy
C. kinetic energy
D. internal (thermal) energy
What is D
400
It takes 30 seconds for a baseball player to run home (well, not his home) after hitting a home run. If the distance between each base is 30 meters, then what was the average velocity of the baseball player?
A. 1 m/s
B. 4 m/s
C. 30 m/s
D. 0 m/s
What is D
400
What is the magnitude of the force needed to keep a 60.-newton rubber block moving across level, dry asphalt in a straight line at a constant speed of 2.0 meters per second?
A. 60. N
B. 40. N
C. 51 N
D. 120 N
What is B
400
Consider a ball rolling down an inclined plane. The normal force on the ball
A. is mg
B. is greater than mg, always
C. may be greater or less than mg
D. is less than mg, always.
What is D
400
A crate is pushed across the floor at a constant speed of 3.0 m/s using a force of 85 newtons. If the worker increases his force to 97 newtons, then what will be the force of friction acting on the crate then?
A. Less than 85 N
B. Exactly 85 N
C. More than 85 N but less than 97 N
D. Exactly 97 N
E. More than 97 N
What is B
400
Take a 0.40 meter long spring with spring constant of 200 N/m and pull it until it is 0.50 meters long. How much work did this take to do?
A. 10 joules
B. 1 joule
C. 5 joules
D. 2 joules
What is B
500
The impulse needed to stop a car moving with a speed of 30 m/s is 6.0 x 104 newton-seconds. What is the mass of that car?
A. 6.0 x 104 kg
B. 1.8 x 106 kg
C. 2.0 x 103 kg
D. it's a trick question - the answer can't be found
What is C.
500
A ball thrown vertically upward reaches a maximum height of 30. meters above the surface of Earth. At its maximum height, the speed of the ball is
A. 0.0 m/s
B. 3.1 m/s
C. 9.8 m/s
D. 24 m/s
What is A
500
You are floating within the international space station. The reason you feel weightless is because
A. there is little to no gravity where the ISS is located
B. you had too much caffeine
C. you are falling at the same rate as the ISS and everything in it
D. you are moving so fast that you are not affected by gravity
What is C
500
A high school physics student is sitting in a seat reading this question. The magnitude of the force with which the seat is pushing up on the student to support him is closest to
A. 0 N
B. 60 N
C. 600 N
D. 6,000 N
What is C.
500
A 110-kilogram bodybuilder and his 55-kilogram friend run up identical flights of stairs. The bodybuilder reaches the top in 4.0 seconds while his friend takes 2.0 seconds. Compared to the power developed by the bodybuilder while running up the stairs, the power developed by his friend is
A. the same
B. twice as much
C. half as much
D. four times as much
What is A.
M
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