2 Points
In an isolated system, two cars, each with a mass of 2,500 kg, collide. Car 1 is
initially at rest, while Car 2 was moving at 20 m/s. What is their speed after
the collision?
A. 5 m/s
B. 25 m/s
C. 10 m/s
D. 20 m/s
SUOMI

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