ECAT Pre Computer Science Chapter 3 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 3 Motion and Force

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ECAT Physics Chapter 3 Motion and Force

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Question # 1

The path described by a projectile is called its

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 the total displacement is divided by total time taken, we get:

Question # 4

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

Question # 5

A 5 kg mass is falling freely, the force acting on, it will be

Question # 6

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

Question # 7

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

Question # 8

The horizontal range of projectile, at a certain place, depends upon

Question # 9

Which one of the following is dimensionless:

Question # 10

The motion in a plane is the motion in

Question # 11

When the mass of the colliding body is much larger than the mass of the body at rest, its velocity after collision.

Question # 12

When a shell explodes in mid-air, its fragments fly off in

Question # 13

Acceleration produced in a body by a force varies

Question # 14

Tick the conservation force:

Question # 15

The linear momentum of the body is defined as

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Sr.# Question Answer
1 A body is thrown from a height h with speed u, it hits the ground with speed V
A. The value of V is maximum if the body is thrown vertically downward
B. The value of V is maximum if the body is thrown vertically upwards
C. The value of V is minimum if the body is thrown horizontally
D. The value of V does not depend on the direction of which it is thrown
2 If a train traveling at 72 kmph is to be brought to rest in a distance of 200 meters then its retardation should be
A. 20 ms-2
B. 10 ms-2
C. 2 ms-2
D. 1 ms-2
3 Range of a projectile is R, when the angle of projection is 30° . Then, the value of the other angle of projection for the same range, is
A. 45°
B. 60°
C. 50°
D. 40°
4 A body walks to his school at a distance of 6 km with a speed of 2.5 km/h and walks back with a constant speed of 5 km/h. His average speed for round trip expressed in km/h is
A. 24/13
B. 10/3
C. 3
D. 4,8
5 Flight of rocket in the space is an example of
A. Newton's first law
B. Newton's third law
C. Newton's second law
D. all of them
6 An object is dropped from a height of 100 m. Its velocity at the moment it touches the ground is:
A. 100 m/sec
B. 140 m/sec
C. 1960 m/sec
D. 196 m/sec
7 Inertial frame of references are those frame of references which are moving with
A. increasing velocity
B. decreasing velocity
C. constant velocity
D. all of them
8 Linear momentum is a
A. fixed quantity
B. constant quantity
C. scalar quantity
D. vector quantity
9 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
10 The displacement coincides with the path of the motion when a body moves is a
A. curved line
B. straight line
C. may be curved or straight
D. none of them
11 What will be the ratio of the distance moved by a freely falling body from rest in 4th and 5th seconds of journey?
A. 4 : 5
B. 7 : 9
C. 16 : 25
D. 1 : 1
12 The path described by a projectile is called its
A. orbit
B. trajectory
C. range
D. distance
13 A cold soft drink is kept on the balance. When the cap is opened, then the weight
A. Increases
B. Decreases
C. First increases, then decreases
D. Remains same
14 The motion of a body in a straight line is the motion in
A. one dimension
B. two dimension
C. three dimension
D. four dimension
15 When a horse pulls a cart, the force that makes the horse run forward is the force exerted by
A. The horse on the ground
B. The horse on the cart
C. The ground on the horse
D. The ground on the cart

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