Physics 121 Test Questions with
Correct Answers
When the block reaches point B, the string breaks. Which of the following now
describes the motion of the cart as it moves cross the table? - Answer-The cart moves
at a constant speed
Eventually, the cart travels off the edge of the table. After the cart leaves the table and
is in the air, which of the following forces act on the cart? - Answer-the force of gravity
If a freely falling object were somehow equipped with an odometer to measure the
distance it travels, then the distance it travels each succeeding second would be the
same. - Answer-Less than the previous second
Starting from rest, a freely-falling object will fall, in 10 seconds, a distance of about... -
Answer-500 meters
When a rock thrown straight upward gets to the exact top of its path, the magnitude of
its - Answer-velocity is zero and its acceleration is about -10m/s
While riding a briskly moving merry-go-round, you prepare to drop an apple. Where will
the apple land? - Answer-farther from the center of the merry-go-round than your hand
A rifle recoils while firing a bullet. The speed of the rifle's recoil is small because the... -
Answer-forces against the rifle is small compared to the force on the bullet
In order to catch a ball, a baseball player moves his or her hand backward in the
direction of the ball's motion. Doing this reduces the force of impact on the player's hand
principally because it.. - Answer-increases the impact time
A 1.0kg chunk of putty moving at 1.0m/s collides and sticks to a 5 kg bowling ball that is
initially at rest. The magnitude of the momentum of the ball and putty after the collision...
- Answer-1.0kg x m/s
A golf ball moving forward with a momentum of 1.0 kg m/s strikes and bounces
backward off a heavy bowling ball that is initially at ret and free to move. The
momentum of the bowling ball after collision.... - Answer-less than 1.0 kg m/s
Correct Answers
When the block reaches point B, the string breaks. Which of the following now
describes the motion of the cart as it moves cross the table? - Answer-The cart moves
at a constant speed
Eventually, the cart travels off the edge of the table. After the cart leaves the table and
is in the air, which of the following forces act on the cart? - Answer-the force of gravity
If a freely falling object were somehow equipped with an odometer to measure the
distance it travels, then the distance it travels each succeeding second would be the
same. - Answer-Less than the previous second
Starting from rest, a freely-falling object will fall, in 10 seconds, a distance of about... -
Answer-500 meters
When a rock thrown straight upward gets to the exact top of its path, the magnitude of
its - Answer-velocity is zero and its acceleration is about -10m/s
While riding a briskly moving merry-go-round, you prepare to drop an apple. Where will
the apple land? - Answer-farther from the center of the merry-go-round than your hand
A rifle recoils while firing a bullet. The speed of the rifle's recoil is small because the... -
Answer-forces against the rifle is small compared to the force on the bullet
In order to catch a ball, a baseball player moves his or her hand backward in the
direction of the ball's motion. Doing this reduces the force of impact on the player's hand
principally because it.. - Answer-increases the impact time
A 1.0kg chunk of putty moving at 1.0m/s collides and sticks to a 5 kg bowling ball that is
initially at rest. The magnitude of the momentum of the ball and putty after the collision...
- Answer-1.0kg x m/s
A golf ball moving forward with a momentum of 1.0 kg m/s strikes and bounces
backward off a heavy bowling ball that is initially at ret and free to move. The
momentum of the bowling ball after collision.... - Answer-less than 1.0 kg m/s
