55 QUESTIONS WITH VERIFIOED ANSWERS
2025/2026
1) Mechanically - force doing work
2) Electrically - work done by moving charges
3) Heating/Radiation - light, sound - CORRECT ANSWER How is energy
transferred?
What happens when an object falls and gains speed? - CORRECT ANSWER When
an object falls and gains speed, its gravitational potential energy store decreases
and its kinetic energy store increases.
When a falling objects hits the ground without bouncing back, its kinetic energy
store is transferred by heating to the thermal energy store of the object and
surroundings, and by sound waves moving away from the point of impact. -
CORRECT ANSWER What happens when a falling object hits the ground without
bouncing back?
-Energy cannot be created or destroyed.
-Energy can be transferred usefully, stored, or dissipated. - CORRECT ANSWER The
conservation of energy
An isolated system in which no energy transfers take place out of or into the
energy stores of the system.
, Energy can be transferred within a closed system. The total energy of the system is
always the same, both before and after any such transfers. - CORRECT ANSWER
What is a closed system?
When a force moves an object, energy is transferred to the object and work is
done.
energy transferred = work done - CORRECT ANSWER When is work done on an
object?
Joules (J) - CORRECT ANSWER What units do both work and energy have?
If an object does not move when a force is applied to it, no work is done on the
object. - CORRECT ANSWER What happens when an object does not move even
though force is applied to it?
Gravitational potential energy is energy associated with an object because of its
position in the Earth's gravitational field. - CORRECT ANSWER What is the
gravitational potential energy store?
Whenever an object is moved upwards, the energy in its gravitational potential
energy store increases because work is done to overcome the gravitational force. -
CORRECT ANSWER What happens to the gravitational potential energy whenever
an object is moved upwards?