KWV 04
ESTION 6 (Start on a new page.)
ox of mass 60 kg starts from rest at height h and slides down a rough slope of
th 10 m, which makes an angle of 25° with the horizontal. It undergoes a constant
leration of magnitude 2 m-s² while sliding down the slope.
25°
60 kg
10 m
h
State the work-energy theorem in words.
(2)
Draw a free-body diagram to show ALL the forces acting on the cardboard
box while it slides down the slope.
(3)
The box reaches the bottom of the slope.
Calculate the following:
6.3.1 The kinetic energy of the box, using the equations of motion
(5
6.3.2
The work done on the box by the gravitational force
6.3.3
The work done on the box by the frictional force, using the work-
energy theorem
6.3.4
The magnitude of the frictional force acting on the box