Please help ASAP.

Where is the potential energy throughout the loading, cocking, and releasing of the trebuchet?

Acar travels 40m in 8 seconds find the car speed

How does the electric potential energy between two charged particles change if one particle is reduced by a factor of 3? a. increased by a factor of 3 b. it is decreased by a factor of 9 c. it is reduced by a factor of 3 d. it is increased by a factor of 9