Page 49 - SP015 Past Years PSPM Chapter 1 -5 Ver.2020
P. 49
PSPM SP015
UPS 2010/2011 SF017 No. 4(b)
21. Force (N)
8
6
4
2
0 0.05 0.10 0.15 0.20 Compression (m)
FIGURE 5.10
FIGURE 5.10 shows the variation between the applied force and compression of a
spring. When the spring is compressed 0.20 m, calculate
(a) the work done on the spring. [3 m]
(b) the potential energy of the spring. [2 m]
UPS 2011/2012 SF016 No. 4(b)
22.
A
B
40 m
20 m
FIGURE 5.11
A sphere of mass 4 kg initially at rest slides along a smooth and curvy surface as shown
in FIGURE 5.11. Calculate
(a) the potential energy of the sphere at point A. [3 m]
(b) the speed of the sphere as it passes point B. [3 m]
49
