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

Laws of motion are not valid in a system which is

Question # 2

The horizontal component of a projectile moving with initial velocity of 500 ms-1at an angle 60° to x-axis is

Question # 3

Which quantity has the same dimension as that of impulse?

Question # 4

A typical rocket consumes about

Question # 5

To get a resultant displacement of 10 m, two displacement vectors of magnitude 6 m and 8 m should be combined

Question # 6

For a moving body, at any instant of time

Question # 7

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

Question # 8

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:

Question # 9

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 # 10

Unit of impulse in

Question # 11

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

Question # 12

Distance covered by a freely falling body in 2 sec will be

Question # 13

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

Question # 14

Biomass includes:

Question # 15

The vertical component of velocity of a projectile during its motion is minimum

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ECAT Physics Chapter 3 Important MCQ's

Sr.# Question Answer
1 A train of 150 m length is going towards north direction at a speed of 10 ms-1. A parrot files at a speed of 5 ms-1towards south direction parallel to the railway track. The time taken by the parrot to cross the train is equal to
A. 12 s
B. 8 s
C. 15 s
D. 10 s
2 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
3 Two bodies of masses 1 kg and 5 kg are dropped gently form the top of a tower. A a point 20 cm from the ground both the bodies will have the same
A. Momentum
B. Kinetic energy
C. Velocity
D. Total energy
4 A 5 kg mass is falling freely, the force acting on, it will be
A. 19.6 N
B. 9.8 N
C. 5 N
D. Zero
5 During the upward motion of the projectile, the vertical component of velocity:
A. Decreases
B. Increases
C. Remains constant
D. None of these
6 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
7 When two protons are brought closer potential energy of both of them:
A. Increases
B. Decreases
C. Remains same
D. None of these
8 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
9 When body moves with increasing acceleration, its velocity time graph is a
A. straight line
B. horizontal straight line
C. vertical straight line
D. curve
10 A mass of 5kg moves with an acceleration of 10m s-2force applied is
A. 10N
B. 50N
C. 2N
D. 20N

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