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

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

Question # 2

Acceleration of a body is positive, if the velocity of the body is

Question # 3

A lift is descending at a constant speed V. A passenger in the lift drops a coin. The acceleration of the coin towards the floor will be

Question # 4

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

Question # 5

A train is moving with a velocity of 25 m/s and a car is moving behind it by a velocity of 8 m/s in same direction. The relative velocity of train with respect to car is

Question # 6

In above figures, tell which set of graphs shows that a body is moving with uniform velocity:

Question # 7

The range of projectile is 50 m whenθ is inclined with horizontal at 15°. What is the range whenθ becomes 45°?

Question # 8

A typical rocket consumes about

Question # 9

Tick the conservative force:

Question # 10

Linear momentum is a

Question # 11

Force is a:

Question # 12

By which velocity a ball be projected vertically so that the distance covered by it in 5th seconds is twice the distance it covers in its 6th second ( g=10m/s2)

Question # 13

Unit of impulse in

Question # 14

The time of flight of a projectile motion equal to

Question # 15

A body of mass 1.0 kg is falling with an acceleration of 10 m/s2. Its apparent weight will be (g=10 m/s2)

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ECAT Physics Chapter 3 Important MCQ's

Sr.# Question Answer
1 If the slope of the velocity-time graph increases at constant rate with time, then the body is said to have
A. uniform deceleration
B. uniform negative acceleration
C. average acceleration
D. uniform positive acceleration
2 The direction of the linear momentum is the direction of
A. speed
B. velocity
C. weight
D. none of them
3 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
4 When a force is applied on a body, several effects are possible Which of the following effect could not occur?
A. the body rotates
B. the body speeds up
C. the mass of the body decreases
D. the body changes its direction
5 The second law gives the relationship between
A. mass and velocity
B. force and acceleration
C. velocity and acceleration
D. mass and weight
6 If the instantaneous velocity of a body does not change. the body is said to be moving with
A. average velocity
B. uniform velocity
C. instantaneous velocity
D. variable velocity
7 A ball is dropped from a height of 4.2 meters. To what height will take it rise if there is no loss of KE after rebounding?
A. 4.2 m
B. 8.4 m
C. 12.6 m
D. none of these
8 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
A. Unequal
B. Exactly equal
C. Roughly equal
D. Zero
9 For a given angle of projection, if the time of flight of a projectile is doubled, the horizontal range will increases to
A. Four times
B. Thrice
C. Once
D. Twice
10 In an elevator moving vertically up with an acceleration 'g' the force exerted on the floor by a passenger of mass M is
A. Mg
B. 1/2 Mg
C. Zero
D. 2 Mg

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