If a net horizontal force of 175 N Is applied to a bike which causes the bike to accelerate at 4.1 m/s^2

What is the acceleration of a spaceship that is initially at rest and then speeds up to 220 m/s in 20 seconds

This is for my 8th grade science class, i really don’t understand. can someone me? , lol.

Aleaky 10-kg bucket is lifted from the ground to a height of 15 m at a constant speed with a rope that weighs 0.7 kg/m. initially the bucket contains 45 kg of water, but the water leaks at a constant rate and finishes draining just as the bucket reaches the 15-m level. find the work done. (use 9.8 m/s2 for g.) show how to approximate the required work by a riemann sum. (let x be the height in meters above the ground. enter xi* as xi.) lim n → ∞ n (9.8)(45−3 xi) i = 1 δx express the work as an integral. 0 dx evaluate the integral. (round your answer to the nearest integer.) j