Page 32 - SP015 Past Years PSPM Chapter 6 -14 Ver 2020

PHYSICS PSPM SEM 1 1999 - 2017

PSPM 2006/2007 SF017/2 No. 4

12. An object is executing a simple harmonic motion with an amplitude of 30 m and a
-2
maximum acceleration of 15 m s . Calculate

(a) the period of motion. [2 m]

(b) the maximum speed of the object. [2 m]

PSPM 2008/2009 SF017/2 No. 4

13. A 0.9 kg object performs a simple harmonic motion according to the following equation

  
y  cos 3t  
4

 2 
where y is in meter and t is in second. At time t = 7 s, calculate the

(a) acceleration of the object. [2 m]

(b) force on the object. [2 m]

PSPM 2008/2009 SF017/2 No. 12(d)

14. At a particular instant, the potential energy of a simple harmonic motion contributes
75% of its total energy. Calculate the displacement if the amplitude of the motion is
5.0 cm. [3 m]

PSPM 2011/2012 SF016/2 No. 6(c)

15. A 200 g object is connected to a spring and moves along the y-axis in a simple
harmonic motion about the origin. The position of the object is given by

y = 0.5 cos (0.4t – 0.25)

where y is in centimeter and t is in seconds. Calculate the

(a) frequency of the motion. [2 m]

(b) velocity of the object at t = 2 s. [2 m]

(c) acceleration of the object at t = 2 s. [2 m]

(d) total energy of the system. [3 m]

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