Page 25 - SP015 Past Years PSPM Chapter 1 -5 Ver.2020
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PSPM SP015
PSPM 2005/2006 SF017/2 No. 10(a)
23. A body of mass m moves with velocity u collides and sticks to a stationary body Q of
mass 3m.
(a) State two physical characteristics of the collision. [1 m]
(b) Determine the total kinetic energy after collision in terms of m and u. [3 m]
(c)
F
t
before during after
collision collision collision
FIGURE 3.3
Copy FIGURE 3.3 and sketch on the same axes, the changes in the force F on
body Q with time t before, during, and after collision. [2 m]
PSPM 2007/2008 SF017/2 No. 10(b)
24. -1
2.0 m s
1.2 kg 0.5 kg
FIGURE 3.4
-1
A 1.2 kg object moving at initial velocity 2.0 m s collides elastically with a stationary
0.5 kg object as shown in FIGURE 3.4. Calculate
(a) the velocity of each object after the collision. [6 m]
(b) the impulsive force if the contact time is 0.3 s. [3 m]
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