Rate of performing work is called power.
Time = work done/Power = 1800/300 = 6 sec.
Therefore it takes 6 secs to perform work.
Answer:
No, it does not.
Explanation:
According to the Law of Gravitation, something going down has more kinetic energy than something going up because it attracts pressure from around it when going down. When it goes up, it has less gravitational force and inertia also stops the ball from rolling upward. Therefore, without the amount of kinetic energy, it will not have the same amount of acceleration.
Well since there are no options i would guess a cave or a space that is very empty with walls that can reflect sound