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

A body is thrown from a height h with speed u, it hits the ground with speed V

Question # 2

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

Question # 3

The projectile attains maximum horizontal range when it is projected at an angle of

Question # 4

A certain force gives an acceleration of 2 m/sec2 to a body if mass 5 kg. The same force would give a 29 kg object an acceleration of:

Question # 5

Which quantity has the same dimension as that of impulse?

Question # 6

Slope of velocity-time graph represents:

Question # 7

Which of the following is not a projectile

Question # 8

The magnitude of the force producing an acceleration of 10 m/sec2in a body of mass 500 grams is:

Question # 9

In equation F=ma, then mass 'm' is

Question # 10

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

Question # 11

Velocity is a

Question # 12

Bodies which falls freely under gravity provides good example of motion under:

Question # 13

When a bicycle is in motion, the frictional forces exerted by the ground are

Question # 14

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

Question # 15

The magnitude of the force producing an acceleration of 10 m/sec2 in a body of mass 500 grams is:

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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 The velocity of a projectile is maximum
A. at the point of projection
B. just before striking the ground
C. at none of them
D. at both of them
3 The sum of the magnitude of two forces acting at a point is 18 and the magnitude of their resultant is 12. If the resultant is at 90° with the force of the smaller magnitude, then their magnitudes are
A. 3, 15
B. 4, 14
C. 5, 13
D. 6, 12
4 The motion of a projectile is
A. one dimension
B. two dimension
C. three dimension
D. all of them
5 The dimension of linear inertia is:
A. MLT2
B. ML°T-2
C. ML°T°
D. MLT-1
6 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
7 When the mass of the colliding body is much larger than the mass of the body at rest, its velocity after collision.
A. Becomes half
B. Becomes zero
C. Ramains same
D. Becomes double
8 Rocket engines lift a rocket from the earth surface, because hot gas with high velocity
A. Push against the air
B. React against the rocket and push it up
C. Heat up the air which lifts the rocket
D. Push against the earth
9 An object is dropped from a height of 100 m. Its velocity at the moment it touches the ground is:
A. 100 m/sec
B. 140 m/sec
C. 1960 m/sec
D. 196 m/sec
10 Acceleration in a body is always produced in the directin of:
A. Velocity
B. Weight
C. Force
D. Botha B and C

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