Question

How much work is done when pushing a crate horizontally with 110 N of force across a 7.0 m factory floor? a) 7.0 J b) 770 J c) 1170 J d) 7700 J

Answer 1

b) 770J

Step-by-step explanation:

We can use the formula that specifically applies to objects moving upward.

G.P.E= mgh where m is mass, g is gravitational acceleration which is constant at 9.81 m/s and h is the height.

Since mg gives the answer for weight which is the same thing as Force they have the same unit N. So we can write the formula as E= wh where w is the weight. Gravitational potential energy and Work done are the same thing since they have the same unit J.

Plug in the values:

W.D= 110×7= 770J