For a specific roller coaster, the cart and its riders are brought to rest using a series of electromagnets. One 80 kg rider used a force sensor to measure the average force experienced during the slowing of the cart. The rider experienced an average force of 2600 N over a duration of 1.6 s. What was the rider’s initial speed before coming to rest? *

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