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

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

Question # 3

The consumption of energy by a 1000 watt heter in half an hour is:

Question # 4

An aircraft is moving with a velocity of 300 ms-1. If all the forces acting on it are balanced, then

Question # 5

The expression F x t is called impulse if the time 't' is

Question # 6

A railway engine (mass 104kg) is moving with a speed of 73 km/h. The force which should be applied to bring it to rest over a distance of 20 m is

Question # 7

Newton's laws are adequate for speeds that are

Question # 8

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

Question # 9

The distance covered by a body in unit time is called.

Question # 10

If m means mass of gases objected per second from a rocket and v shows the change in velocity, than mv is named as:

Question # 11

A mass of 5kg moves with an acceleration of 10m s-2force applied is

Question # 12

The SI units of momentum is

Question # 13

The instantaneous velocity is define as the limiting value of Δd/Δt on the time intervalΔt approaches to

Question # 14

A ball is dropped from a certain height and another ball is projected horizontally from the same point. Which of the following statement is correct?

Question # 15

If a ball comes back to its starting point after bouncing off the wall several times, then its

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ECAT Physics Chapter 3 Important MCQ's

Sr.# Question Answer
1 Unit of impulse in
A. Newton
B. Kg m
C. Kg m/s
D. Joule
2 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
3 A typical rocket ejects the burnt gases at speeds over
A. 400 ms-1
B. 40000m s-1
C. 40000 ms-1
D. 60000 ms-1
4 Newton's laws are adequate for speeds that are
A. low compared with the speed of light
B. equal to the speed of light
C. greater than the speed of light
D. all of them
5 A car moves for half of its time at 80 km/h and rest half of time at 40 km/h, The total distance covered is 60 km. What is the average speed of the car?
A. 60 km/hr
B. 80 km/hr
C. 120 km/hr
D. 180 km/hr
6 A certain force gives an acceleration of 2 m/sec2to a body mass 5 kg. The same force would give a 20 kg object an acceleration of:
A. 0.5 m/sec2
B. 5 m/sec2
C. 1.5 m/sec2
D. 9.8 m/sec2
7 A body moving with an acceleration of 5 m/sec2started with velocity of 10 m/sec. What will be the distance traversed in 10 seconds?
A. 150 m
B. 250 m
C. 350 m
D. 400 m
8 When a shell explodes in mid-air, its fragments fly off in
A. only one direction
B. in two direction
C. different directions
D. a particular direction
9 The product of force and time is called change in:
A. Momentum
B. Impulse
C. Force
D. Both a and b
10 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

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