Two small masses that are 10.0 cm apart attract each other with a force of 10.0 n. when they are 5.0 cm apart, these masses will attract each other with what force?
(g = 6.673 ´ 10 to the -11 power n times m squared/kg squared
a.
5.0 n
c.
20.0 n
b.
2.5 n
d.
40.0 n

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