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

Newton's first law is also called:

Question # 2

When brakes are applied to a fast moving car, the passengers will be thrown:

Question # 3

A ball is dropped from a height of 4.2 meters. To what height it will rise if there is no loss of KE after rebounding?

Question # 4

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

Question # 5

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 # 6

Distance traveled by a body falling from rest in the first, second and third second is in the ration of

Question # 7

One KWh is equal to:

Question # 8

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

Question # 9

What will be the ratio of the distance moved by a freely falling body from rest in 4th and 5th seconds of journey?

Question # 10

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

Question # 11

In the expression F x t, the force F is

Question # 12

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

Question # 13

A non-inertial frame of reference is that frame of reference in which

Question # 14

The dimension of linear inertia is:

Question # 15

The decrease in velocity per unit time is called:

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Sr.# Question Answer
1 The mass of a body measured by a physical balance in a lift at rest is found to be m, if the lift is going up with an acceleration a, its mass will be measured as
A. m (1 - a/g)
B. m (1 + a/g)
C. m
D. Zero
2 The slopes of the tangent at any point on the curve gives the value of the
A. average velocity at that point
B. instantaneous velocity at that point
C. average acceleration at that point
D. instantaneous acceleration at that point
3 When two protons are brought closer potential energy of both of them:
A. Increases
B. Decreases
C. Remains same
D. None of these
4 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?
A. Both hit the ground at the same veloctiy
B. Both hit the ground at the same speed
C. The change of velocity during the path for both balls is the same
D. The change of speed during the path for both balls is the same
5 The motion in a plane is the motion in
A. one dimension
B. two dimension
C. three dimension
D. four dimension
6 A body falls freely from rest. It covers as much distance in the last second of its motion as covered in the first three seconds. The body has fallen for a time of
A. 3 s
B. 5 s
C. 7 s
D. 9 s
7 Bodies failing freely under gravity provide good example of motion under
A. non-uniform acceleration
B. uniform acceleration
C. variable acceleration
D. increasing acceleration
8 The product of force and time is called
A. acceleration
B. linear momentum
C. angular momentum
D. impulse
9 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
10 The vertical component of velocity of a projectile during its motion is minimum
A. at the time of projection
B. at the highest point
C. just before hitting the plane of projection
D. all of them
11 One newton is a force that produces an acceleration of 0.5 m/sec2in a body of mass:
A. 2 Kg
B. 3 Kg
C. 4 Kg
D. 8 Kg
12 When a person jumps off the ground, the reaction force of the ground is
A. greater than the weight of the person
B. smaller than the weight of the person
C. equal to the weight of the person
D. zero
13 In above figures, tell which set of graphs shows that a body is moving with uniform velocity:
A. (i) and (ii)
B. (ii) and (iii)
C. (iii) and (iv)
14 When brakes are applied to a fast moving car, the passengers will be thrown:
A. Forward
B. Backward
C. Downward
D. None of these
15 The direction of the linear momentum is the direction of
A. speed
B. velocity
C. weight
D. none of them

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