ACTIVITY 2
15 marks, 15 minutes
The force F is applied at an angle of 20° to the horizontal, on a crate as shown in
the diagram below.
20 kg
20°
F
A constant frictional force of 3 N acts between the surface and the crate. The
coefficient of kinetic friction between the crate and the surface is 0.2
2.1 Draw a labelled free-body diagram showing ALL the forces acting
on the crate. (4)
2.2 Calculate the magnitude of the:
2.2.1 Normal force acting on the crate.
2.2.2 Force F.
2.2.3 Acceleration of the crate (3)
(4)
(4)
[15]