Drop a book and a sheet of paper, and you’ll see that the book has a greater acceleration—g. repeat, but place the paper beneath the book so that it is forced against the book as both fall, so both fall equally at g. how do the accelerations compare if you place the paper on top of the raised book and then drop both? you may be surprised, so try it and see. then explain your observation.

What distance does a car travel as its speed changes from 0 to 20 m/s in 17 s at constant acceleration?

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

Suppose astronomers built a 140-meter telescope. how much greater would its light-collecting area be than that of the 10-meter keck telescope? express your answer using two sign