ECAT Pre Engineering Physics Chapter 3 MCQ Test With Answer

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

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Physics ECAT Pre Engineering Chapter 3 Motion and Force

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Question # 1

The decrease in velocity per unit time is called

Question # 2

Angular momentum

Question # 3

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

Question # 4

Acceleration produced in a body by a force varies

Question # 5

A ball falls on the surface from 10 m height and rebounds to 2.5 m. if the duration of contact with the floor is 0.01 seconds then the average acceleration during contact is

Question # 6

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

Question # 7

Slope of velocity time graph represents:

Question # 8

When a body is moving on a surface, the force of friction is called

Question # 9

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

Question # 10

According to the law of conservation of linear momentum, the total linear momentum of an isolated system

Question # 11

The consumption source if energy is:

Question # 12

The SI units of momentum is

Question # 13

The mass of the object is a quantities measure of its

Question # 14

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

Question # 15

If an iron ball and a wooden ball of the same radius was released from a height 'h' in vacuum, then time taken by both of them to reach ground will be

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ECAT Physics Chapter 3 Important MCQ's

Sr.# Question Answer
1 A body is thrown from a height h with speed u, it hits the ground with speed V
A. The value of V is maximum if the body is thrown vertically downward
B. The value of V is maximum if the body is thrown vertically upwards
C. The value of V is minimum if the body is thrown horizontally
D. The value of V does not depend on the direction of which it is thrown
2 The vertical and horizontal range will be equal id angle of projection is
A. 76°
B. 45°
C. 60°
D. 120°
3 Distance traveled by a body falling from rest in the first, second and third second is in the ration of
A. 1 : 2 : 3
B. 1 : 3 : 5
C. 1 : 4 : 9
D. None of the above
4 A body is dropped from a tower with zero velocity, reaches ground in 4s. The height of the tower is about
A. 80 m
B. 20 m
C. 160 m
D. 40 m
5 If m means mass of gases objected per second from a rocket and v shows the change in velocity, than mv is named as:
A. Force
B. Energy
C. work
D. impulse
6 When the mass of the colliding body is much larger than the mass of the body at rest, its velocity after collision.
A. Becomes half
B. Becomes zero
C. Ramains same
D. Becomes double
7 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
A. 25 m
B. 20 m
C. 50 m
D. 9.8 m
8 When a shall explodes a mid-air, the total momentum of its fragments is
A. less than the momentum of shell
B. equal to the momentum of shell
C. greater than the momentum of shell
D. none of them
9 A typical rocket consumes about
A. 100 kg s-1of fuel
B. 1000 kg s-1of fuel
C. 10000 kg s-1of fuel
D. 100000 kg s-1of fuel
10 Distance covered by a freely failing body n the first second of its motion will be:
A. 4.9 m
B. 9.8 m
C. 19.6 m
D. 29.4 m

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