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

Essential characteristic of equilibrium is

Question # 2

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

Question # 3

A man fires a bullet of mass 200 g at a speed of 5 m/s. The gun is of one kg mass. By what velocity the gun rebounds backwards?

Question # 4

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

Question # 5

In the expression F x t, the force F is

Question # 6

Rate of change of momentum is called

Question # 7

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

Question # 8

Maximum height of a bullet when fixed at 30 with horizontal is 11 m. Then height when it is fired at 60° is

Question # 9

Ethanol (alcohol) is a type of:

Question # 10

Acceleration in a body is always produced in the direction of :

Question # 11

Acceleration of a body is positive, if the velocity of the body is

Question # 12

Ethanol (alcohol) as a type of:

Question # 13

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

Question # 14

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

Question # 15

The product of force and time is called

Question # 16

The time rate of change of displacement is called:

Question # 17

Change in momentum is one second is called:

Question # 18

A the top of the trajectory of a projectile, the directions of its velocity and acceleration are

Question # 19

Change in momentum is one second called.

Question # 20

A particle of mass 0.5 g moving along x-axis is located of x1= 15 m at t1= 5s and x2= 33 m at t2= 13s its average velocity is

Question # 21

The horizontal range of projectile, at a certain place, depends upon

Question # 22

Suppose the water flows out from a pipe at 3kg s-1and its velocity changes from 5m s-1to zero on striking the wall, then the force exerted by water on wall will be

Question # 23

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 # 24

The velocity of a body at any instant of its motion is known as

Question # 25

If the velocity time graph is a straight line parallel to time-axis, then it means that:

Question # 26

When a force is applied on a body, several effects are possible Which of the following effect could not occur?

Question # 27

A certain force gives an acceleration of 2 m/sec2 to a body if mass 5 kg. The same force would give a 29 kg object an acceleration of:

Question # 28

A body whose momentum is constant must have constant

Question # 29

Angular momentum

Question # 30

A car moves for half of its time at 80 km/h and rest half of time at 40 km/h, The total distance covered is 60 km. What is the average speed of the car?

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ECAT Physics Chapter 3 Important MCQ's

Sr.# Question Answer
1 Newton's first law is also called:
A. Law of torque
B. Law of force
C. Law of inertia
D. None of these
2 A ball is dropped from a height of 4.2 meters. To what height it will rise if there is no loss of KE after rebounding?
A. 4.2 m
B. 8.4
C. 12.6
D. None of these
3 A body moving with an acceleration of 5 m/sec2started with velocity of 10 m/sec. What will be the distance traversed in 10 seconds?
A. 150 m
B. 250 m
C. 350 m
D. 400 m
4 Acceleration produced in a body by the force varies
A. inversely as the applied force
B. directly as the applied force
C. directly as the mass of the body
D. none of them
5 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
6 For a given angle of projection, if the time of flight of a projectile is doubled, the horizontal range will increases to
A. Four times
B. Thrice
C. Once
D. Twice
7 In the expression F x t, the force F is
A. total force
B. instantaneous force
C. average force
D. all of them
8 Rate of change of momentum is called
A. Impulse
B. Force
C. Torque
D. Momentum
9 The distance covered by a body in unit time is called.
A. Displacement
B. speed
C. Velocity
D. Both B and C
10 When a person jumps off the ground, the reaction force of the ground is
A. greater than the weight of the person
B. smaller than the weight of the person
C. equal to the weight of the person
D. zero

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