College Physics Chapters 1 TO
30 EXAM Questions and Answers
Verified Solutions Latest Update
Question:
If work was done on an object, the object must have
Answer:
changed its position.
Question:
A brick slides across a horizontal rough surface and eventually comes to a stop. What
happened to the kinetic energy of the brick?
Answer:
It was converted to other energy forms, mostly heat.
Question:
What is possessed by a moving object, but not a stationary object?
Answer:
Kinetic Energy
Question:
The power of an engine is a measure of
Answer:
the rate at which it can perform work.
Question:
Which has the greater kinetic energy-a 1 ton car moving at 30 m/s or a half-ton car
moving at 60 m/s?
Answer:
The half-ton car.
, Question:
A 20 N ball and a 40 N ball are dropped at the same time from a height of 10 meters.
Air resistance is negligible. What is accurate?
Answer:
Balls hit the ground at the same time but gravity does more work on the heavy ball
than on the light ball.
Question:
When work is done by a force on an object, then what is true?
Answer:
The work done is equal to the change of total energy of the object plus any energy
appearing as heat, light, or sound.
Question:
A block sits on a slight incline, held at rest by the frictional force between the block and
the incline. What is true about this?
Answer:
The work done by the frictional force is equal to the gravitational potential energy of
the block.
Question:
A Teflon-coated box of rocks slides down a rough incline. What is true about this?
Answer:
The mechanical energy of the block is decreasing.
Question:
Initially, a blue automobile has twice the kinetic energy that a red automobile has. both
are braked to a stop; both have the same amount of braking force. The red auto will
stop in _____________ as the blue auto.
Answer:
four times the distance
30 EXAM Questions and Answers
Verified Solutions Latest Update
Question:
If work was done on an object, the object must have
Answer:
changed its position.
Question:
A brick slides across a horizontal rough surface and eventually comes to a stop. What
happened to the kinetic energy of the brick?
Answer:
It was converted to other energy forms, mostly heat.
Question:
What is possessed by a moving object, but not a stationary object?
Answer:
Kinetic Energy
Question:
The power of an engine is a measure of
Answer:
the rate at which it can perform work.
Question:
Which has the greater kinetic energy-a 1 ton car moving at 30 m/s or a half-ton car
moving at 60 m/s?
Answer:
The half-ton car.
, Question:
A 20 N ball and a 40 N ball are dropped at the same time from a height of 10 meters.
Air resistance is negligible. What is accurate?
Answer:
Balls hit the ground at the same time but gravity does more work on the heavy ball
than on the light ball.
Question:
When work is done by a force on an object, then what is true?
Answer:
The work done is equal to the change of total energy of the object plus any energy
appearing as heat, light, or sound.
Question:
A block sits on a slight incline, held at rest by the frictional force between the block and
the incline. What is true about this?
Answer:
The work done by the frictional force is equal to the gravitational potential energy of
the block.
Question:
A Teflon-coated box of rocks slides down a rough incline. What is true about this?
Answer:
The mechanical energy of the block is decreasing.
Question:
Initially, a blue automobile has twice the kinetic energy that a red automobile has. both
are braked to a stop; both have the same amount of braking force. The red auto will
stop in _____________ as the blue auto.
Answer:
four times the distance
