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

Which one of the following is dimensionless.

Question # 2

A cold soft drink is kept on the balance. When the cap is opened, then the weight

Question # 3

Graphs which are used to illustrate the variation of velocity of an object with time are called

Question # 4

A boat of mass 40 kg is at rest, A dog of mass 4 kg moves in the boat with a velocity of 10 m/s. What is the velocity of boat?

Question # 5

Flight of rocket in the space is an example of

Question # 6

If the velocity of the body decreases non-uniformly then the slope of the velocity-time graph will have

Question # 7

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

Question # 8

The linear momentum of the body is defined as

Question # 9

The collision in which KE is conserved but momentum is not conserved is called:

Question # 10

The range of projectile is 50 m whenθ is inclined with horizontal at 15°. What is the range whenθ becomes 45°?

Question # 11

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

Question # 12

During the upward motion of the projectile, the vertical component of velocity.

Question # 13

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)

Question # 14

If the velocity time graph is a straight line parallel to time-axis, then it means that:

Question # 15

A body is moving with constant velocity of 10 m/sec in the north-east direction. Then its acceleration will be:

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ECAT Physics Chapter 3 Important MCQ's

Sr.# Question Answer
1 Dimensions of velocity are
A. [L]
B. [T]
C. [LT-1]
D. [LT-2]
2 When the surfaces are coated with a lubricant, then they
A. Stick to each other
B. Slide upon each other
C. Roll upon each other
D. None of these
3 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?
A. 4.2 m
B. 8.4
C. 12.6
D. None of these
4 If the acceleration of a body is not uniform, then velocity-time graph will be:
A. Curve
B. Straight line
C. Sphere
D. All of these
5 One KWh is equal to:
A. 3.6 x 102J
B. 3.6 KJ
C. 3,6 x 101KJ
D. 3,6 MJ
6 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
7 The time rate of change of displacement is called:
A. Time
B. Acceleration
C. Speed
D. Velocity
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 In velocity of a particle at an instant is 10 m/s and after 5s the velocity of the particle is 20 m/s. The velocity 3s before in m/s is
A. 8
B. 4
C. 6
D. 7
10 Bodies which falls freely under gravity provides good example of motion under:
A. Uniform acceleration
B. Non-uniform acceleration
C. Uniform velocity
D. None of these

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