Answer to Question #283442 in Physics for Junard

Question

A grocery is pulled along a rough horizontal surface of 6.0 N. It moves through a distance of 7.0 m at a constant speed. a)How much work is carried out by this force? b)How much work is carried out by friction? c)Find the total work done on the cart?

Answer 1

a)The work carried out by this force:

$$W=Fd=6·7=42\text{ N}.$$

b) The work carried out by friction:

$$W=fd=6·7=42\text{ N}.$$

с) The total work is the work done by the force, or 42 N.