PPSC Physics Full Book With Answers

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PPSC Physics Full Book

Sr. # Questions Answers Choice
1 When net force acting on a system is zero which of the following will be constant. Force Linear momentum Angular momentum Linear impulse
2 The magnitude of the resultant of two equal forces is equal to either to the force What is the angle between the two forces 0 <sup>o</sup> 120 <sup>o</sup> 60 <sup>o</sup> 180 <sup>o</sup>
3 The dimensional formula for torque is identical to. Kinetic energy Pressure energy Moment of force All of the above
4 In rotational motion, the analogue of force is. moment of inertia Moment of force Torque Rotational inertia
5 Conventionally antilock wise torque is taken as. Zero Positive Infinity Negative
6 The SI unit of torque. kg m2 kg ms-2 kg m2 s-2 kg ms -1
7 The equal and opposite forces acting on a body form Angular momentum Linear momentum Torque Couple
8 if the line of action of force passes through the axis of rotation of origin, then torque is. Maximum Negative Zero 1
9 The perpendicular distance between the line of action of forces and the axis of rotation Torque Moment arm Moment of force Momentum
10 If 'p' is the momentum of an object of mass 'm' the expression p2/m has base units identical to. Power Force Velocity Energy
11 Torque is equal to. The product of magnitude of force and acceleration The product of magnitude of force and momentum The product of magnitude of force and displacement The product of magnitude of force and angular velocity
12 A physical quantity which produces rotation in a body is called. Force Torque Momentum accelerate
13 When a body acceleatres. Its direction always chances It mass always changes It velocity always changes It falls towards the earth
14 A force of 50 N acts on a body for 10 s What will be change in momentum. 5 Ns 500 Ns 200 Ns 800 N s
15 The rate of change of momentum of a body falling under gravity is equal to its. P.E. K.E Weight Density
16 A rocket propulsion is based on the principle of. Conservation of momentum Conservation of mass Conservation of energy Floatation
17 The period of a geostationary satellite is. 32 hours 72 hours 48 hours 96 hours
18 The escape velocity Is independent of mas of the body Increases with the increases of mass of the body Decreases with the decreases of mass of the body Depends upon the type of body used
19 The term radius of gyration relates to. Moment of force Moment of inertia Law of gravitation simple harmonic motion
20 The force of gravity between two objects does not depend upon the. Constant of gravitation Separation Product of their masses Sum of their masses
21 If the earth stopped rotating the weight of objects at either pole would. Be grater Be less Vary with altitude Be the same before
22 Where should be the centre of gravity of a body. It must be within the body It must be outside the body It may be near but not essentially within the body It changes its position after sometime
23 Which of the following quantity is zero about the centre of mass of baody. Mass Acceleration Moment Angular momentum
24 The working of the rocket is based on the principle of. Electromagnetism Conservation of momentum Floatation Hydraulic system
25 A bomb dropped from an aeroplane explodes in air, its total. Momentum decreases Momentum increases K.E. Increases K.E. Decreases
26 If a car is to gain momentum it must. Lose inertia accelerate Move rapidly Lose weight
27 The SI unit of impulse is. N m N s Kg ms -1 Both b and c
28 In any collision between two bodies there need nor the conservation of Linear momentum Angular momentum Total energy Kinetic energy
29 The product of force and duration of impact is called. Density Momentum Torque Impulse
30 Rate of change of momentum is called. Torque Force Impulse Inertia
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