PPSC Physics Chapter 1 MECHANICS With Answers

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PPSC Physics Chapter 1 MECHANICS

Sr. # Questions Answers Choice
1 Simple harmonic motion may be assumed as a projectio of uniform circular motion along a Diagonal hypotenuse Diameter Radius
2 Restoring force in SHM is. Centripetal Frictional Conservative Non conservative
3 The Circular motion of a particle with constant speed is. Periodic and SHM Periodic but not SHM linear and SHM Neither periodic nor SHM
4 The total energy of body executing SHM is directly proportional to. Amplitude Square of amplitude Square root of amplitude Reciprocal of amplitude
5 The angular frequency time period and frequency of a simple pendulum depends only on the. Mass and amplitude Mass and gravitational acceleration Amplitude and frequency Length and gravitational acceleration.
6 The angular frequency time period and frequency in SHM not depend upon. Mass Force constant Amplitude Restoring force
7 In simple harmonic motion we have the conservation of. K.E. P.E Total energy Electrical energy
8 When damping is small amplitude of vibrational resonance will be small Large Infinite Un changed
9 A simple pendulum suspended from the celling of a lift has a time period T when the lift falls freely the time period of the pendulum will become Zero T/9.8 9.8 T Infinity
10 A spring of force constant k is out into three equal pats. The force constant of earth part will b e. k 3 k k/3 k/2
11 Restoring force in the SHM is Centripetal Frictional Conservative Non conservative
12 The curve between the acceleration and velocity of a body in SHM is a Circle Ellipse Square Parabola
13 The graph between restoring force and time in SHM is a Straight line Parabola Sine wave Circle
14 What is the number of degree of freedom of an oscillating simple gravity pendulum 1 2 3 4
15 Which of the following quantities associated with SHM does not vary periodically. velocity Displacement Acceleration Total energy
16 The SI unit of spring constant is identical with that of. Force Pressure Surface tension Loudness
17 Frequency of second pendulum is. 0.5 Hz 1.0 Hz 1.5 Hz 2.0 Hz
18 If mass attached to a spring increases then its time period. Increases Decreases Remains constant Decreases slightly
19 The time period of a simple pendulum is independent of its. Length Mass Acceleration due to gravity Restoring force
20 If length of second pendulum becomes four times than its time period will become Two times Four times Six times Eight times
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