Page 23 - Physics Form 5 KSSM_Neat

1.2 Resolution of Forces CHAPTER 1

Force and Motion II
KEMENTERIAN PENDIDIKAN MALAYSIA

Pulling force

Direction of motion

Figure 1.13 Tarik upih game

Figure 1.13 shows a boy pulling his friend during a tarik upih game at the school sports carnival.
Why is the motion of the friend to the right while the direction of the applied pulling force is
inclined upwards? This is due to the pulling force having a horizontal component and a vertical
component. Resolution of forces is the process of resolving a force into two components.

Normal Pulling force Normal Vertical component
reaction reaction of the pulling force

Resolution of the
pulling force

Horizontal
component of
Frictional force Frictional force the pulling force

Weight of the boy Weight of the boy

Figure 1.14 Resolution of the pulling force when the boy is being pulled
The pulling force acting on the boy can be resolved into two perpendicular components
as shown in Figure 1.14. The vertical component is to balance the weight of the boy while the
horizontal component overcomes friction and moves the boy to the right. How do we determine
the magnitudes of the two components?

LS 1.2.1 13