Page 40 - SP015 Past Years PSPM Chapter 1 -5 Ver.2020

PHYSICS PSPM SEM 1 1999 - 2017

UPS 2013/2014 SF016 No. 3(a)

35.

m 1

m 2

FIGURE 4.24

Two masses m 1 = 3 kg and m 2 = 10 kg are connected by a light string which passes over
a smooth pulley as shown in FIGURE 4.24. Calculate the

(a) acceleration of the system. [4 m]

(b) tension in the string. [1 m]

UPS 2013/2014 SF016 No. 3(b)

36.

F m 1 m 2 m 3

FIGURE 4.25

Three blocks are in contact with each other on a frictionless horizontal surface as shown
in FIGURE 4.25. A horizontal force F is applied to m 1. Given m 1 = 3.5 kg, m 2 = 4.0 kg,
m 3 = 5.0 kg and F = 30.0 N. Calculate the

(a) acceleration of the system. [3 m]

(b) magnitude of the contact force between blocks m 1 and m 2. [2 m]

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