Question

A man pushes a block of 30 Kg along a level floor at constant speed with a force directed at 45° below the horizontal. If the coefficient of friction is 0.20, then:work done by all the forces exerted by the surface on the block in 20 meters is -1500 J. true Or false explain How its true and false​

Answer 1

Answer:

it's true see explanation

Explanation:

first draw free body diagram

(2)

normal reactions force can be calculated as

(3)and work done can be calculated as