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

A ball is thrown upwards with a velocity of 100 m/s. It will reach the ground after

Question # 2

A body whose momentum is constant must have constant

Question # 3

A ball is dropped vertically down and it takes time t to reach the ground. At time t/2

Question # 4

Ethanol (alcohol) is a type of:

Question # 5

The displacement coincides with the path of the motion when a body moves is a

Question # 6

When brakes are applied to a fast moving car, the passengers will be thrown:

Question # 7

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

Question # 8

The time of flight of a projectile motion equal to

Question # 9

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 # 10

A projectile on its path gets divided into two pieces at its highest point. Which is true?

Question # 11

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 # 12

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 # 13

When a shell explodes in mid-air, its fragments fly off in

Question # 14

When a bicycle is in motion, the frictional forces exerted by the ground are

Question # 15

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

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ECAT Physics Chapter 3 Important MCQ's

Sr.# Question Answer
1 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?
A. 0.1 m/s
B. 10 m/s
C. 1 m/s
D. 0.01 m/s
2 In the expression F x t, the force F is
A. total force
B. instantaneous force
C. average force
D. all of them
3 Dimensions of velocity are
A. [L]
B. [T]
C. [LT-1]
D. [LT-2]
4 The decrease in velocity per unit time is called:
A. Variable Acceleration
B. Average Acceleration
C. Retardation
D. None of these
5 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
6 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
7 The decrease in velocity per unit time is called
A. deceleration
B. acceleration
C. uniform acceleration
D. variable acceleration
8 A vehicle of mass 120 kg is moving with a uniform velocity of 108 km/h. The force required to stop the vehicle in 10s is
A. 120 x 10.8 N
B. 180 N
C. 720 N
D. 360 N
9 For a fixed force, larger is the mass of a body the
A. greater is its acceleration
B. smaller is its acceleration
C. smaller is its weight
D. zero is its acceleration
10 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

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