Please help me with question I will mark you brainiest

Amoving electron has kinetic energy k1. after a net amount of work w has been done on it, the electron is moving one-quarter as fast in the opposite direction. (a) find w in terms of k1. (b) does your answer depend on the final direction of the electron's motion?

4. if you were an astronaut on the moon, what would you experience? what would you see from your perspective?

Which pair of quantities includes one quantity that increases as the other decreases during simple harmonic motion?