ECAT Pre General Science Physics Chapter 3 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 3 Motion and Force

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ECAT Pre General Science Physics Chapter 3 Motion and Force

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Question # 1

A ball is dropped downwards After 1 second another ball is dropped downwards from the same point. What is the distance between them after 3 seconds

Question # 2

Acceleration of a body is negative if the velocity of the body is

Question # 3

The area under line velocity-time graph is numerically equal to the

Question # 4

A body of mass 1.0 kg is falling with an acceleration of 10 m/s2. Its apparent weight will be (g=10 m/s2)

Question # 5

A body of weight 1 N has a kinetic energy of 1 joule when its speed is:

Question # 6

If the acceleration of a body is not uniform, then velocity-time graph will be:

Question # 7

Work done along a closed path in a gravitational force is:

Question # 8

The short distance between two points direction from its initial point to final point is called:

Question # 9

When a shall explodes a mid-air, the total momentum of its fragments is

Question # 10

For maximum linear distance of travel, a projectile must be fired at an angle of

Question # 11

When body moves with increasing acceleration, its velocity time graph is a

Question # 12

Two bullets are fired simultaneously, horizontally and with different speeds from the same place. Which bullet will hit the ground first?

Question # 13

If rope of lift breaks suddenly. The tension exerted by the surface of lift is (a=Acceleration of lift)

Question # 14

The velocity given to a body to go out of the influence of earth's gravity is known as:

Question # 15

The mass of a body measured by a physical balance in a lift at rest is found to be m, if the lift is going up with an acceleration a, its mass will be measured as

Question # 16

If m means mass of gases objected per second from a rocket and v shows the change in velocity, than mv is named as:

Question # 17

An aircraft is moving with a velocity of 300 ms-1. If all the forces acting on it are balanced, then

Question # 18

The expression F x t is called impulse if the time 't' is

Question # 19

In an elevator moving vertically up with an acceleration 'g' the force exerted on the floor by a passenger of mass M is

Question # 20

When a bicycle is in motion but not pedaled, the force of friction exerted by the ground on the two wheels is such that it acts

Question # 21

The magnitude of the force producing an acceleration of 10 m/sec2 in a body of mass 500 grams is:

Question # 22

One KWh is equal to:

Question # 23

The SI units of momentum is

Question # 24

The magnitude of the force producing an acceleration of 10 m/sec2in a body of mass 500 grams is:

Question # 25

In the above figures, tell which set is graphs shows that a body is moving uniform velocity:

Question # 26

When two protons are brought closer potential energy of both of them:

Question # 27

Bodies failing freely under gravity provide good example of motion under

Question # 28

A body of mass 5 kg is acted upon by a constant force of 20 n for 7 seconds. The total change in momentum will be:

Question # 29

A non-inertial frame of reference is that frame of reference in which

Question # 30

A dirty carpet is to be cleaned by heating. This is an accordance with____ law of motion:

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ECAT Class Physics Chapter 3 Important MCQ's

Sr.# Question Answer
1 If the acceleration of a body is negative, then slope of the velocity-time graph will be:
A. Zero
B. Positive
C. Negative
D. Infinity
2 Change in momentum is one second called.
A. Impulse
B. Force
C. Energy
D. Work
3 To get a resultant displacement of 10 m, two displacement vectors of magnitude 6 m and 8 m should be combined
A. Parallel
B. Antiparallel
C. At angle 60°
D. Perpendicular to each other
4 A body walks to his school at a distance of 6 km with a speed of 2.5 km/h and walks back with a constant speed of 5 km/h. His average speed for round trip expressed in km/h is
A. 24/13
B. 10/3
C. 3
D. 4,8
5 When two protons are brought closer potential energy of both of them:
A. Increases
B. Decreases
C. Remains same
D. None of these
6 The three equation of motions are useful only for
A. linear motion with increasing acceleration
B. line motion with uniform acceleration
C. linear motion with zero acceleration
D. linear motion with varying acceleration
7 The motion of a body in a straight line is the motion in
A. one dimension
B. two dimension
C. three dimension
D. four dimension
8 If the velocity of the body decreases non-uniformly then the slope of the velocity-time graph will have
A. different values
B. same values
C. zero valves
D. constant valves
9 The decrease in velocity per unit time is called
A. deceleration
B. acceleration
C. uniform acceleration
D. variable acceleration
10 A body is moving with constant velocity of 10 m/sec in the north-east direction. Then its acceleration will be:
A. 10 m/sec2
B. 20 m/sec2
C. 30 m/sec2
D. Zero

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