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

Slope of velocity-time graph represents:

Question # 2

In an elevator moving vertically up with an acceleration 'g' the force exerted on the floor by a passenger of mass M is

Question # 3

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 # 4

One KWh is equal to:

Question # 5

If the instantaneous velocity of a body does not change. the body is said to be moving with

Question # 6

When the mass of the colliding body is much larger than the mass of the body at rest, its velocity after collision.

Question # 7

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

Question # 8

When a horse pulls a cart, the force that makes the horse run forward is the force exerted by

Question # 9

Work done along a closed path in a gravitational field is:

Question # 10

If the values of instantaneous and average velocities are equal, the body is said to be moving with

Question # 11

A body whose momentum is constant must have constant

Question # 12

A 120 m long train is moving in a direction with speed 20 m/s. A train B moving with 30 m/s in the opposite direction and 130 m long crosses the first train in a time

Question # 13

Acceleration of a body is positive, if the velocity of the body is

Question # 14

A typical rocket consists of fuel

Question # 15

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

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ECAT Physics Chapter 3 Important MCQ's

Sr.# Question Answer
1 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
2 If the instantaneous velocity of a body does not change. the body is said to be moving with
A. average velocity
B. uniform velocity
C. instantaneous velocity
D. variable velocity
3 Work done along a closed path in a gravitational force is:
A. maximum
B. Minimum
C. Zero
D. Unity
4 A lift is moving up with acceleration equal to 1/5 of that due to gravity. The apparent weight of a 60 kg man standing in lift is
A. 60 kg wt
B. 72 kg wt
C. 48 kg wt
D. Zero
5 Graphs which are used to illustrate the variation of velocity of an object with time are called
A. distance time graphs
B. speed time graphs
C. velocity time graphs
D. acceleration time graphs
6 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
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?
A. 4.2 m
B. 8.4
C. 12.6
D. None of these
8 A 120 m long train is moving in a direction with speed 20 m/s. A train B moving with 30 m/s in the opposite direction and 130 m long crosses the first train in a time
A. 6 s
B. 36 s
C. 38 s
D. None of these
9 A dirty carpet is to be cleaned by heating. This is an accordance with____ law of motion:
A. First
B. Second
C. Third
D. None of these
10 A body of weight 1 N has a kinetic energy of 1 joule when its speed is:
A. 1.46 m sec-1
B. 2.44 m sec-1
C. 3.42 m sec-1
D. 4.43 m sec-1

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