Page 31 - SP015 Past Years PSPM Chapter 1 -5 Ver.2020

PSPM SP015

PSPM JAN 2000/2001 SF015/2 No. 1

10.
wall R

light string
60
block
pulley
light string
smooth table load

FIGURE 4.5

A 30 N block is placed on a surface of a smooth table as shown in FIGURE 4.5. A
30 N load is connected to one end of the block with a light string through a smooth
pulley. The other end of the block is tied with a string to a wall. Calculate the reaction
force R acting on the block. [3 m]

PSPM JUN 2000/2002 SF015/2 No. 1

11. 700 N
30

650 N

FIGURE 4.6

A plate is exerted by two forces as shown in FIGURE 4.6. Calculate the magnitude and
direction of the third force that needs to be exerted so that the plate is in equilibrium.
[4 m]

PSPM 2002/2003 SF017/2 No. 2

12. 5 N

3 N
45 O 30

60
F
4 N

FIGURE 4.7

FIGURE 4.7 shows a system of forces in the same plane on an equilibrium point O,
calculate the force F. [4 m]

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