ECAT Pre Computer Science Chapter 3 MCQ Test With Answer

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

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ECAT Physics Chapter 3 Motion and Force

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Question # 1

Inertial frame of references are those frame of references which are moving with

Question # 2

Distance covered by a freely failing body n the first second of its motion will be:

Question # 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?

Question # 4

At the top of the trajectory of a projectile the acceleration is

Question # 5

The instantaneous velocity is define as the limiting value of Δd/Δt on the time intervalΔt approaches to

Question # 6

An object thrown upward with an initial velocity at certain angle with the horizontal and moving freely under the action of gravity is called

Question # 7

The projectile motion is composed of

Question # 8

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

Question # 9

In the expression F x t, the force F is

Question # 10

Rate of change of momentum is called

Question # 11

When a person jumps off the ground, the reaction force of the ground is

Question # 12

A person is sitting in a traveling train and facing the engine. He tosses up a coin and the coin falls behind him. It can be concluded that the train is

Question # 13

A lift is descending at a constant speed V. A passenger in the lift drops a coin. The acceleration of the coin towards the floor will be

Question # 14

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

Question # 15

Newton published laws of motion in his famous book "principia" in

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ECAT Physics Chapter 3 Important MCQ's

Sr.# Question Answer
1 In equation F=ma, then mass 'm' is
A. rest mass
B. variable mass
C. inertial mass
D. gravitational mass
2 A snooker ball moving with velocity V collides head on with another snooker ball of same mass at rest. If the collision is elastic, the velocity of second snooker ball is
A. Zero
B. Infinity
C. V
D. 2 V
3 Laws of motion are not valid in a system which is
A. inertial
B. non-interial
C. at rest
D. moving with uniform velocity
4 Blomass includes:
A. Crop residue
B. Natural vegetation
C. Animal dung
D. All of these
5 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
6 Two projectiles are fired from the same point with the same speed at angles of projection 60° and 30° respectively. Which one of the following is true?
A. Their range will be same
B. Their maximum height will be same
C. Their landing velocity will be same
D. Their time of flight will be same
7 During the projectile motion, the horizontal component of velocity
A. changes with time
B. remains constant
C. becomes zero
D. decreases with time
8 For a moving body, at any instant of time
A. If the body is not moving the acceleration is necessarily zero
B. If the body is slowing, the retardation is negative
C. If the body is slowing, the distance is negative
D. If displacement, velocity and acceleration at that instant are known, we can find the displacement at any given time in future
9 The projectile motion is composed of
A. horizontal motion only
B. vertical motion only
C. horizontal and vertical motion
D. none of them
10 The magnitude of the force producing an acceleration of 10 m/sec2in a body of mass 500 grams is:
A. 3 N
B. 4 N
C. 5 N
D. 6 N

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