Page 28 - SP015 Past Years PSPM Chapter 1 -5 Ver.2020
P. 28
PHYSICS PSPM SEM 1 1999 - 2017
UPS 2007/2008 SF017 No. 3(b)
33. v 1
60
30
v 2
FIGURE 3.7
-1
A homemade rocket is moving at a speed of 45 m s . The rocket breaks into two pieces
of equal mass which fly off with velocities, v 1 and v 2, as shown in FIGURE 3.7.
Calculate the magnitude of v 1 and v 2.
(Neglect the effect of gravity.) [6 m]
UPS 2009/2010 SF017 No. 3(b)
34. y
u P
x
P C
u Q
Q
FIGURE 3.8
-1
Two objects, P of mass 7 kg and Q of mass 5 kg move with velocity u P = 6 m s and
-1
u Q = 8 m s on a smooth surface as shown in FIGURE 3.8. The objects collide and
combined at C. The combined object travels with velocity v.
(a) Determine the velocity v. [4 m]
(b) Show that the collision is inelastic. [3 m]
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