If a horse does 4000 j of work over 20 m, how much force does the horse use?
200 n
2,000 n
2 n
20,000 n

can anyone explain to me how to solce this

An electron moves with a constant horizontal velocity of 3.0 × 106 m/s and no initial vertical velocity as it enters a deflector inside a tv tube. the electron strikes the screen after traveling 26 cm horizontally and 19 cm vertically upward with no horizontal acceleration. what is the constant vertical acceleration provided by the deflector? (the effects of gravity can be ignored.)