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

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 # 2

The shortest distance between two points directed from its initial point to final point is called:

Question # 3

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

Question # 4

Acceleration produced in a body by a force varies

Question # 5

A motorist travels A to B at a speed at 40 km/h and returns at speed of 60km/h. His average speed will be

Question # 6

The second law gives the relationship between

Question # 7

The dimension of linear inertia is:

Question # 8

What must be changing when a body is accelerating uniformly?

Question # 9

Find the total displacement of a body in 8 seconds starting from rest with an acceleration of 20 cm/s2

Question # 10

If speed of electron is 5 x 105m/s. How long does it take one electron to transverse 1 m?

Question # 11

Linear momentum is a

Question # 12

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

Question # 13

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

Question # 14

Force is a:

Question # 15

If a car rest acceleration uniformly to a speed of 144 km/h in 20 s it covers a distance of

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Sr.# Question Answer
1 The expression F x t is called impulse if the time 't' is
A. zero
B. very large
C. very small
D. infinite
2 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
A. Unequal
B. Exactly equal
C. Roughly equal
D. Zero
3 The artillery shells travel along parabolic paths under the influence of
A. magnetic field
B. electric field
C. electromagnetic field
D. gravitational field
4 Which quantity has the same units as impulse
A. force
B. work
C. linear momentum
D. acceleration
5 By which velocity a ball be projected vertically so that the distance covered by it in 5th seconds is twice the distance it covers in its 6th second ( g=10m/s2)
A. 58.8 m/s
B. 49 m/s
C. 65 m/s
D. 19.6 m/s
6 Laws of motion are not valid in a system which is
A. inertial
B. non-interial
C. at rest
D. moving with uniform velocity
7 A body of mass 5 kg is acted upon by a constant force of 20 n for 7 seconds. The total change in momentum will be:
A. 10 NS
B. 100 NS
C. 140 NS
D. 200 NS
8 A dirty carpet is to be cleaned by heating. This is in according with______law of motion.
A. First
B. Second
C. Third
D. None of these
9 An object thrown upward with an initial velocity at certain angle with the horizontal and moving freely under the action of gravity is called
A. a rocket
B. an aeroplane
C. a projectile
D. a ballon
10 The magnitude of the force producing an acceleration of 10 m/sec2 in a body of mass 500 grams is:
A. 3 N
B. 4 N
C. 5 N
D. 6 N

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