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

What must be changing when a body is accelerating uniformly?

Question # 2

The displacement coincides with the path of the motion when a body moves is a

Question # 3

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

Question # 4

When a body is moving on a surface, the force of friction is called

Question # 5

A train cover 90 km in half an hour. the time taken by it to travel 15 km will be:

Question # 6

A monkey sits on the pan of spring scale kept in an elevator. The reading of the spring scale will be maximum when

Question # 7

The dimension of linear inertia is:

Question # 8

The path (or trajectory) described by a projectile is

Question # 9

If the slope of the velocity-time graph increases at constant rate with time, then the body is said to have

Question # 10

The area under line velocity-time graph is numerically equal to the

Question # 11

Angular momentum

Question # 12

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

Question # 13

Which of the following four statements is false?

Question # 14

The path followed by the projectile is known as:

Question # 15

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

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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 A snooker ball moving with velocity V collides head on with another snooker ball of same mass at rest. If the collision is elastic, the velocity of second snooker ball is
A. Zero
B. Infinity
C. V
D. 2 V
3 When the total displacement is divided by total time taken, we get:
A. Velocity
B. Average speed
C. Average velocity
D. None of these
4 An inertial frame of reference is that frame of reference in which
A. a = 0
B. a > 0
C. a < 0
D. all of them
5 Laws of motion are not valid in a system which is
A. inertial
B. non-interial
C. at rest
D. moving with uniform velocity
6 Acceleration of a body is negative if the velocity of the body is
A. constant
B. increasing
C. decreasing
D. none of them
7 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
8 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
A. 3,600 N
B. 7,200 N
C. 10,000 N
D. 100,000 N
9 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
10 Ethanol (alcohol) as a type of:
A. Electric fuel
B. Bio fuel
C. Nuclear fuel
D. None of these

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