Which situation would result in a decrease of 39.2 J in the described object's gravitational potential energy? A.
A 1.00-kg toy car on a flat track slows from 8.85 m/s to 0.
B.
A 2.00-kg projectile rises the last 2.00 meters to the top of its trajectory.
C.
A 4.00-kg stone falls 1.00 m.
D.
A 0.500-kg squirrel climbs 8.00 m up into a tree.

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