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

When a force is applied on a body, several effects are possible Which of the following effect could not occur?

Question # 2

Change in momentum is one second called.

Question # 3

At the top of the trajectory of a projectile the acceleration is

Question # 4

Acceleration produced in a body by a force varies

Question # 5

Bodies failing freely under gravity provide good example of motion under

Question # 6

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?

Question # 7

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

Question # 8

An object thrown upward with an initial velocity at certain angle with the horizontal and moving freely under the action of gravity is called

Question # 9

When a person jumps off the ground, the reaction force of the ground is

Question # 10

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

Question # 11

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

Question # 12

A dirty carpet is to be cleaned by heating. This is in according with______law of motion.

Question # 13

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

Question # 14

If m is the mass of the gases ejected per second with velocity v relative to the rocket of mass M, then the acceleration of rocket is

Question # 15

The effect of applying a force on a moving body is to change

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ECAT Physics Chapter 3 Important MCQ's

Sr.# Question Answer
1 Acceleration of a body is negative if the velocity of the body is
A. constant
B. increasing
C. decreasing
D. none of them
2 Newton published laws of motion in his famous book "principia" in
A. 1867
B. 1667
C. 1676
D. 1687
3 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
4 In the expression F x t, the force F is
A. total force
B. instantaneous force
C. average force
D. all of them
5 A boat of mass 40 kg is at rest, A dog of mass 4 kg moves in the boat with a velocity of 10 m/s. What is the velocity of boat?
A. 4 m/s
B. 2 m/s
C. 8 m/s
D. 1 m/s
6 If the values of instantaneous and average velocities are equal, the body is said to be moving with
A. uniform acceleration
B. uniform speed
C. variable velocity
D. uniform velocity
7 A ball is dropped vertically down and it takes time t to reach the ground. At time t/2
A. The ball had covered exactly half the distance
B. The velocity of the ball was V/3 where V is the velocity when it reached the ground
C. The ball had covered less than half the distance
D. The ball had covered more than half the distance
8 If speed of electron is 5 x 105m/s. How long does it take one electron to transverse 1 m?
A. 1 x 106
B. 2 x 106
C. 2 x 105
D. 1 x 105
9 The projectile motion is composed of
A. horizontal motion only
B. vertical motion only
C. horizontal and vertical motion
D. none of them
10 A particle of mass 0.5 g moving along x-axis is located of x1= 15 m at t1= 5s and x2= 33 m at t2= 13s its average velocity is
A. 6 m s-1
B. 2.45 m s-1
C. 2.25 m s-1
D. 4.45 m s-1

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