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

If the slope of the velocity-time graph increases at constant rate with time, then the body is said to have

Question # 2

If m is the mass of the gases ejected per second with velocity v relative to the rocket of mass M, then the acceleration of rocket is

Question # 3

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

Question # 4

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

Question # 5

A force of 50 dynes is acted on a body of mass 5 g which is at rest, for an interval of 3 seconds, then impulse is

Question # 6

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

Question # 7

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?

Question # 8

The dimension of linear inertia is:

Question # 9

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

Question # 10

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 # 11

The three equation of motions are useful only for

Question # 12

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

Question # 13

Blomass includes:

Question # 14

Which one of the following is dimensionless:

Question # 15

A typical rocket ejects the burnt gases at speeds over

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ECAT Physics Chapter 3 Important MCQ's

Sr.# Question Answer
1 The second law gives the relationship between
A. mass and velocity
B. force and acceleration
C. velocity and acceleration
D. mass and weight
2 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
3 A stone is dropped from rest from the top of a tower 19.6 m high. The distance traveled during the last second of its fall is (giving g=9.8 m/ss)
A. 9.8 m
B. 14.7 m
C. 4.9 m
D. 19.6 m
4 The horizontal component of a projectile moving with initial velocity of 500 ms-1at an angle 60° to x-axis is
A. 500 ms-1
B. 1000 ms-1
C. 250 ms-1
D. Zero
5 According to the law of conservation of linear momentum, the total linear momentum of an isolated system
A. increases
B. decreases with time
C. remains constant
D. none of them
6 Swimming becomes possible because of______law of motion.
A. First
B. Second
C. Third
D. None of these
7 When the total displacement is divided by total time taken, we get:
A. Velocity
B. Average speed
C. Average velocity
D. None of these
8 The motion in a plane is the motion in
A. one dimension
B. two dimension
C. three dimension
D. four dimension
9 A ball is dropped vertically down and it takes time t to reach the ground. At time t/2
A. The ball had covered exactly half the distance
B. The velocity of the ball was V/3 where V is the velocity when it reached the ground
C. The ball had covered less than half the distance
D. The ball had covered more than half the distance
10 The range of projectile is 50 m whenθ is inclined with horizontal at 15°. What is the range whenθ becomes 45°?
A. 400 m
B. 300 m
C. 200 m
D. 100 m

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