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AP physics unit 3 |2025
UPDATE|COMPREHENSIVE MOST TESTED
QUESTIONS AND VERIFIED
SOLUTIONS|GET IT 100% ACCURATE!!
A car moves at constant speed what is the work being done - (ANSWER)none
because f=ma and their is no acceleration
A person compresses a spring - (ANSWER)positive work done, both displacement
and force vectors point the same way
A block slides on a rough surface - (ANSWER)negative because the force of
friction opposes displacement, angle of cos(180) = -1
A mass is held - (ANSWER)no work is done (no displacement)
A person stretches a spring - (ANSWER)positive work
A block is lowered back to the ground - (ANSWER)negative work, because force
points upwards and displacement points downwards
work formula - (ANSWER)force x displacement(cosθ) or Kf-Ki
, 2
Will adding other ropes to lift a mass change the work done to lift the mass by the
original mass? - (ANSWER)No because mass hasn't changed
Will the change in speed of a sled be less if the sled starts from rest or is already
moving - (ANSWER)when the sled starts from rest because then applied work can
directly translate into kinetic energy, while if it is already moving not all force will
be converted into kinetic because some energy will be lost due to other forces
acting upon the sled
How to calculate the maximum height of something using energy formula -
(ANSWER)add up gravitational and kinetic energy and equal that to mgh
How to find a car speed at different positions when you have total energy -
(ANSWER)total energy- Ug=1/2mv^2
If an elevator is moving down with a constant or increasing speed what kind of
energies does it have - (ANSWER)Ug, K
An arrow is released from a bow what kind of energies does it have -
(ANSWER)Kinetic, Us
Energies a ball has at it's highest point - (ANSWER)Ug
What kind of energies does a hockey stick flexed during a slapshot have -
(ANSWER)K, Us
AP physics unit 3 |2025
UPDATE|COMPREHENSIVE MOST TESTED
QUESTIONS AND VERIFIED
SOLUTIONS|GET IT 100% ACCURATE!!
A car moves at constant speed what is the work being done - (ANSWER)none
because f=ma and their is no acceleration
A person compresses a spring - (ANSWER)positive work done, both displacement
and force vectors point the same way
A block slides on a rough surface - (ANSWER)negative because the force of
friction opposes displacement, angle of cos(180) = -1
A mass is held - (ANSWER)no work is done (no displacement)
A person stretches a spring - (ANSWER)positive work
A block is lowered back to the ground - (ANSWER)negative work, because force
points upwards and displacement points downwards
work formula - (ANSWER)force x displacement(cosθ) or Kf-Ki
, 2
Will adding other ropes to lift a mass change the work done to lift the mass by the
original mass? - (ANSWER)No because mass hasn't changed
Will the change in speed of a sled be less if the sled starts from rest or is already
moving - (ANSWER)when the sled starts from rest because then applied work can
directly translate into kinetic energy, while if it is already moving not all force will
be converted into kinetic because some energy will be lost due to other forces
acting upon the sled
How to calculate the maximum height of something using energy formula -
(ANSWER)add up gravitational and kinetic energy and equal that to mgh
How to find a car speed at different positions when you have total energy -
(ANSWER)total energy- Ug=1/2mv^2
If an elevator is moving down with a constant or increasing speed what kind of
energies does it have - (ANSWER)Ug, K
An arrow is released from a bow what kind of energies does it have -
(ANSWER)Kinetic, Us
Energies a ball has at it's highest point - (ANSWER)Ug
What kind of energies does a hockey stick flexed during a slapshot have -
(ANSWER)K, Us
