A 5kg block is being moved to 3m by a force of 50N inclined to the horizontal at an angle of 30°. Assuming that a friction force of 5N opposing its motion ,find the acceleration of the block and the work done by the block.

Answer 1

If the movement was in the direction of the force...

workdone=change in KE + change in PE
and workdone = force*distance=50*3=150Joules

netforce=mass*acceleration
50-mg*sin30=m*A
put mass m, and g in, solve for acceleration A