PPSC Physics Chapter 1 MECHANICS With Answers

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PPSC Physics Chapter 1 MECHANICS

Sr. # Questions Answers Choice
1 Solar cells are thin sand whishes of good conductors Bad conductors Semi conductor Insulators
2 Which of the following is a non conservative force. Gravitational force Air resistance Elastic force Tension in a string
3 Which of the following is a conserfative force. Electric force Frictional force Normal force propulsion force of a rocket
4 The field in which the work done is independent of the path followed. Conservative field Electric field Magnetic field Non conservative field
5 The hydrogen filled balloon possesses P.E K.E Heat energy Elastic energy
6 The source of geothermal energy is The fusion in the sun the radioactive decay in the earths interior the rotation of earth around the sun The rotation of earth around its own axis
7 The work required to lift a ball of mass 'm' from the surface of the earth to an infinite distance is Absolute P.E. of the body P.E of the body K.E. of the body Chemical energy of the body
8 When an arrow is shot from a bow, it has K.E. which is given to it by The elongated tail The stretched string of bow The throw of archer The sharp arrows head
9 A bus and a car moving with the same K.E. are acted upon by the same retarding force then the car will stop first Bus will stop first Both will stop simultaneously Both will never stop
10 A mason of 9.8 N weight is climbing on a 20 m high ladder The P.E. of mason at the middle of the ladder is. 98 J 196 J 960 .4 J 1920 .8 J
11 When a person holding a pall is moving in the forward direction, the work done on the pall is Positive Negative Zero Equal to gravity
12 The work done in moving a body from one place to another in a gravitational field is independent of the applied force Force of gravity Path followed by the body Force of earth
13 A neutron is in head on elastic collision with a stationary nitrogen nucleus The mass of nitrogen nucleus is 14 times that of a neutron The neutrons velocity after the collision is. Less in magnitude than its intimal velocity Less in magnitude than the final velocity of the nitrogen atom Equal in magnitude to its initial velocity but in the opposite direction Greater in magnitude than its initial velocity
14 when a bowl of water is take into the bottom of a well the work done is. Positive Negative Zero Maximum
15 The value of 'g' is affected by earth's Non spherical shape Daily motion Volume Density
16 When a body is lifted through a height 'h' the work done on the body appears in the form of. K.E P.E Heat Density
17 An object falls freely under gravity the vertical equilibrium of the body inside is Stable Unstable Neutral Unknown
18 A body is equilibrium may not have Momentum Velocity acceleration K.E.
19 A body is in a static equilibrium, only when it is Moving with uniform velocity Moving with variable velocity Moving with uniform acceleration at rest
20 A body is said to be in translations equilibrium, only if the vector sum of all the forces acting on it becomes. Double Zero Maximum Quadruples
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