Page 37 - SP015 Past Years PSPM Chapter 1 -5 Ver.2020

PSPM SP015

PSPM JAN 1999/2000 SF015/2 No. 10(c)

26.



FIGURE 4.18

FIGURE 4.18 shows a wooden block at rest on a track inclined at an angle  with the
horizontal axis. Coefficient of static friction and coefficient of kinetic friction between
the block and the track are 0.4 and 0.3 respectively.
(a) Determine the maximum angle  max that causes the block to slide. [2 m]
(b) What is the acceleration of the block when it slides? [3 m]

UPS 2001/2002 SF015 No. 4(b)

27.
6.2 kg

8.5 kg

FIGURE 4.19

FIGURE 4.19 shows two blocks of mass 6.2 kg and 8.5 kg are connected with a string.
Assume that the string will not extend, calculate the tension of the string and the
acceleration of the system if the coefficient of kinetic friction bewteen the 6.2 kg block
and the table surface is 0.2. [5 m]

PSPM 2003/2004 SF017/2 No. 1

28. A block is launched on to a smooth inclined plane.

-1
v (m s )
2

t (s)
2
FIGURE 4.20

If the variation of the velocity v of the block with time is shown in FIGURE 4.20,
calculate
(a) the acceleration of the block. [1 m]
(b) the angle between the inclined plane and the horizontal. [2 m]

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