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

An object is dropped from a height of 100 m. Its velocity at the moment it touches the ground is:

Question # 2

The shortest distance between two points directed from its initial point to final point is called:

Question # 3

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 # 4

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 # 5

A ball falls on the surface from 10 m height and rebounds to 2.5 m. if the duration of contact with the floor is 0.01 seconds then the average acceleration during contact is

Question # 6

Acceleration produced in a body by a force varies

Question # 7

Acceleration of a body is negative if the velocity of the body is

Question # 8

The decrease in velocity per unit time is called

Question # 9

Change in momentum is one second called.

Question # 10

What must be changing when a body is accelerating uniformly?

Question # 11

A force of 50 dynes is acted on a body of mass 5 g which is at rest, for an interval of 3 seconds, then impulse is

Question # 12

Ethanol (alcohol) as a type of:

Question # 13

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

Question # 14

One KWh is equal to:

Question # 15

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

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ECAT Physics Chapter 3 Important MCQ's

Sr.# Question Answer
1 One KWh is equal to:
A. 3.6 x 102J
B. 3.6 KJ
C. 3,6 x 101KJ
D. 3,6 MJ
2 The dimension of linear inertia is:
A. MLT2
B. ML0T-2
C. ML0T0
D. MLT-1
3 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
4 Slope of velocity-time graph represents:
A. Acceleration
B. Speed
C. Torque
D. Work
5 The SI units of momentum is
A. kg m s-2
B. kg ms
C. kg m s2
D. N-s
6 Inertia mass and gravitational mass are
A. opposite
B. identical
C. identical when there is no friction
D. all of them
7 The product of force and time is called change in:
A. Momentum
B. Impulse
C. Force
D. Both a and b
8 Which of the following statements for an object in equilibrium is not true?
A. The object must be at rest
B. The object can be at rest
C. The object is moving at constant speed
D. The acceleration of the object is zero
9 When a bicycle is in motion but not pedaled, the force of friction exerted by the ground on the two wheels is such that it acts
A. In the backward direction on the front wheel and in the forward direction on the rear wheel
B. In the forwards directions on the front wheel and in the backward direction on the rear wheel
C. In the forward direction on both the wheels
D. In the backward direction on both the wheels
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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