Ineed on 8th grade physical science

What is the momentum of a 2 kg object moving at 15 meters per second

Will mark as brainliest how does a catapult increase the trajectory of an object? ps. answer as if u were a 5th grader

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