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

A dirty carpet is to be cleaned by heating. This is an accordance with____ law of motion:

Question # 2

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

Question # 3

When we consider the average velocity of a body, then the body is moving in

Question # 4

Which of the following statements for an object in equilibrium is not true?

Question # 5

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

Question # 6

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

Question # 7

If the acceleration of a body is not uniform, then velocity-time graph will be:

Question # 8

When a shall explodes a mid-air, the total momentum of its fragments is

Question # 9

One newton is a force that produces an acceleration of 0.5 m/sec2in a body of mass:

Question # 10

For a given angle of projection, if the time of flight of a projectile is doubled, the horizontal range will increases to

Question # 11

If the velocity time graph is a straight line parallel to the time-axis, then it means:

Question # 12

A the top of the trajectory of a projectile, the directions of its velocity and acceleration are

Question # 13

If a train traveling at 72 kmph is to be brought to rest in a distance of 200 meters then its retardation should be

Question # 14

Change in momentum is one second is called:

Question # 15

Velocity of a body changes if

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ECAT Physics Chapter 3 Important MCQ's

Sr.# Question Answer
1 When a bicycle is in motion, the frictional forces exerted by the ground are
A. In the forward direction on both the wheels
B. In the backward direction on both the wheels
C. In the forward direction on the front wheel and the backward direction on the rear wheel
D. In the backward direction on the front wheel and the forward direction on the rear wheel
2 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
3 A certain force gives an acceleration of 2 m/sec2to a body mass 5 kg. The same force would give a 20 kg object an acceleration of:
A. 0.5 m/sec2
B. 5 m/sec2
C. 1.5 m/sec2
D. 9.8 m/sec2
4 Two bodies of masses 1 kg and 5 kg are dropped gently form the top of a tower. A a point 20 cm from the ground both the bodies will have the same
A. Momentum
B. Kinetic energy
C. Velocity
D. Total energy
5 Two projectiles are fired from the same point with the same speed at angles of projection 60° and 30° respectively. Which one of the following is true?
A. Their range will be same
B. Their maximum height will be same
C. Their landing velocity will be same
D. Their time of flight will be same
6 Which one of the following is dimensionless:
A. Acceleration
B. Velocity
C. Density
D. Angle
7 A body is dropped from a tower with zero velocity, reaches ground in 4s. The height of the tower is about
A. 80 m
B. 20 m
C. 160 m
D. 40 m
8 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)
A. 9.8 m
B. 14.7 m
C. 4.9 m
D. 19.6 m
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 When a body is moving on a surface, the force of friction is called
A. Static friction
B. Dynamic friction
C. Limiting friction
D. Rolling friction

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