Page 30 - Physics Form 5 KSSM_Neat

Activity 1.7

Aim: To use a Vector Force Table Kit to demonstrate forces in equilibrium
Apparatus: Vector Force Table Kit and slotted weights of various masses

Instructions:
1. Set up the apparatus as shown in Photograph 1.5. Pulley A and pulley B are fixed at positions 0°
KEMENTERIAN PENDIDIKAN MALAYSIA
and 30° respectively at the vector force table.
Pulley B

Pulley C

Pulley A
Plate
Photograph 1.5 Photograph 1.6
2. Place slotted weights of mass 200 g on the plate below pulley
SCAN ME
A and slotted weights of mass 150 g on the plate below pulley SCAN ME
B. The metal ring will be displaced and will touch the metal Video of method to
rod at the centre of the vector force table. achieve forces in
equilibrium
3. Add slotted weights on the plate below pulley C until the metal
http://bit.ly/36wG4vP
ring no longer touches the metal rod, as shown in Photograph 1.6.
Record the mass of the slotted weights and determine the position
of pulley C.
4. Repeat steps 1 to 3 with pulley B at positions 90° and 150°.
5. Record your results in Table 1.6.
Results:
Table 1.6
Pulley A Pulley B Pulley C

Force Force Force
Mass / Mass / Mass /
Position applied / Position applied / Position applied /
g g g
N N N
0° 200 2.0 30° 150 1.5
0° 200 2.0 90° 150 1.5
0° 200 2.0 150° 150 1.5

Discussion:
Based on the results of this activity, predict the angles between the three forces in equilibrium when
the three forces have the same magnitude.

20 LS 1.3.2