Page 41 - SP015 Past Years PSPM Chapter 1 -5 Ver.2020

PSPM SP015

UPS 2014/2015 SF016 No. 3(b)

37.

P Q

30 53

FIGURE 4.26

FIGURE 4.26 shows two blocks, P and Q on a frictionless plane connected by a cord
passing over a frictionless pulley. If the masses of P and Q are 100 kg and 50 kg
respectively.

(a) Sketch a free body diagram of block P. [3 m]

(b) Calculate the acceleration of the block. [5 m]

PSPM 2014/2015 SF016/2 No. 3(d)

38.
F

50

FIGURE 4.27

FIGURE 4.27 shows a 500 N force, F acts on a stationary 25 kg box lying on a rough
-1
surface. After 4 s, the speed of the box is 2 m s . Calculate

(a) the frictional force on the box. [3 m]

(b) the coefficient of kinetic friction between the box and the rough surface. [1 m]

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