1. A force of 50.0 lb is used to push a box 10.0 ft across a level floor.?

Question

1. A force of 50.0 lb is used to push a box 10.0 ft across a level floor. (a) How much work was done on the box? (b) What is the change of potential energy as a result of this move?

Answer 1

Work = Force * Distance

W = 50 * 10 *12 (in/ft)

Potential Energy didn't change, P=0
If you pushed it up a ramp the P would increase.

Answer 2

potential is stress situations distance over the years, or paintings over the years, or the 'cost of doing paintings' First we want to discover the stress utilized the conventional stress utilized is equivalent and opposite to the frictional stress. because the coefficient of friction is 0.20, we may be able to discover the utilized stress because the coefficient of friction is an similar because the ratio of the frictional stress to the conventional stress. the floor is aspect, so the conventional stress is mg enable mu be the coefficient of friction, mu = Ff/Fn Fn= mg = (one hundred kg)(9.81N/kg) mu = 0.20 so, Ff = mu mg or 196 N The utilized stress must be equivalent and opposite then, to 196 N with the intention to maintain the consistent speed, actual? potential = F x d throughout t the fast way is to make certain that d over t is speed and basically multiply 196 through 2 m/s undemanding potential = 392 Nm/s or 392 Watts yet when we ought to bypass the lengthy way, discover the gap for 10 seconds certain, that is 20 meters and the time for sure is 10 seconds, so P = F x d / t P = 196 x 20 throughout 10 P = 392 Watts