Page 38 - SP015 Past Years PSPM Chapter 6 -14 Ver 2020
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PHYSICS PSPM SEM 1 1999 - 2017
PSPM 2015/2016 SF016/2 No. 6(a)
28. Sketch a graph of potential energy against displacement for SHM. [1 m]
PSPM 2015/2016 SF016/2 No. 6(b)
29. x (cm)
8
4
0 t (s)
0.2 0.4 0.6 0.8 1.0
–4
–8
FIGURE 9.9
A 0.2 kg object performs SHM with displacement, x from the equilibrium point as in
FIGURE 9.9.
(a) Determine the amplitude. [1 m]
(b) Calculate the angular velocity. [3 m]
(c) Calculate the total energy of the system. [3 m]
PSPM 2017/2018 SF016/2 No. 6(b)
30. In an engine, a 200 g piston oscillates in a simple harmonic motion with displacement
varying according to x (t) = 5 cos 2t where x is in meter and t is in second.
(a) Write the expression for its vibrational velocity as a function of time, v (t). [2 m]
(b) Sketch the graph of velocity against time of the piston for the first complete cycle
starting from t = 0 [2 m]
(c) Calculate the maximum acceleration of the system. [2 m]
(d) Calculate the total energy of the system. [2 m]
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