Page 52 - SP015 Past Years PSPM Chapter 1 -5 Ver.2020
P. 52
PHYSICS PSPM SEM 1 1999 - 2017
UPS 2015/2016 SF016 No. 4(b)(ii)
30.
FIGURE 5.15
FIGURE 5.15 shows a 35 kg block connected to a spring through a smooth pulley. The
-1
spring constant is 350 N m . Initially the block is stationary and the spring is
unstretched. If the block is released, calculate the speed of the block when the spring is
stretched 0.5 m. [4 m]
PSPM 2015/2016 SF016/2 No. 3(b)
31. 2.5 kg
pulley
2 kg
FIGURE 5.16
FIGURE 5.16 shows a 2.5 kg block connected to a 2 kg load by a light string through a
pulley of negligible mass. The coefficient of kinetic friction between the block and the
table is 0.18. When the system is released, calculate the
(a) acceleration of the block. [4 m]
(b) tension in the string. [1 m]
(c) total kinetic energy of the system after the block has moved 0.6 m using the work-
energy theorem. [4 m]
(d) final velocity, v f of the block. [2 m]
52
