7. How does the law of conservation of energy account for the slowing down of
moving objects?
A. The kinetic energy of the object is
increased as it moves.
C. Energy is slowly transferred to the
ground as friction.
B. The object slowly loses its mass,
which also reduces energy.
D. Amount of energy is destroyed as
the object moves.
8. How is the law of conservation of energy applied in an elastic collision?
A. Kinetic energy is always
C. Half of the kinetic energy is always
conserved.
completely conserved.
B. Potential energy is always
D. Kinetic energy is completely lost.
completely conserved.
9. Which of the following ways will help in increasing the potential energy of the
object?
A. Push the object harder.
C. Make sure the object will easily
slow down.
B. Increase the height of the object
D. Add wheels to the object so it
moves faster.
from the ground.
10. Which of the following shows how energy is transformed between potential and
kinetic energy?
A. potential energy potential
kinetic energy →
energy
kinetic energy
C. kinetic energy
kinetic energy
D. kinetic energy
B. potential energy → kinetic energy
potential energy
→ potential energy
→ kinetic energy​