ECAT Pre General Science Physics Chapter 3 MCQ Test With Answer

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

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ECAT Pre General Science Physics Chapter 3 Motion and Force

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Question # 1

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 # 2

Suppose the water flows out from a pipe at 3kg s-1and its velocity changes from 5m s-1to zero on striking the wall, then the force exerted by water on wall will be

Question # 3

A body is moving with constant velocity of 10 m/sec in the north east direction. Then its acceleration will be:

Question # 4

One KWh is equal to:

Question # 5

The displacement coincides with the path of the motion when a body moves is a

Question # 6

During the projectile motion, the horizontal component of velocity

Question # 7

What must be changing when a body is accelerating uniformly?

Question # 8

The three equation of motions are useful only for

Question # 9

The discuss used by athlete has a mass of 1 kg, its weight in newton is

Question # 10

The direction of velocity is along the direction of

Question # 11

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

Question # 12

Newton's first law is also called:

Question # 13

Tick the conservation force:

Question # 14

Newton's laws are adequate for speeds that are

Question # 15

Acceleration in a body is always produced in the direction of :

Question # 16

Bodies failing freely under gravity provide good example of motion under

Question # 17

The dimension of linear inertia is:

Question # 18

If the water falls from a dam into a turbine wheel 19.6 m below, then the velocity of water at the turbine, is (Take g=9.8 m/s2)

Question # 19

If the values of instantaneous and average velocities are equal, the body is said to be moving with

Question # 20

The projectile motion is composed of

Question # 21

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

Question # 22

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 # 23

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

Question # 24

Rocket engines lift a rocket from the earth surface, because hot gas with high velocity

Question # 25

The second law gives the relationship between

Question # 26

If a car rest acceleration uniformly to a speed of 144 km/h in 20 s it covers a distance of

Question # 27

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

Question # 28

When a bicycle is in motion, the frictional forces exerted by the ground are

Question # 29

One KWh is equal to:

Question # 30

Inertia mass and gravitational mass are

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Sr.# Question Answer
1 In the expression F x t, the force F is
A. total force
B. instantaneous force
C. average force
D. all of them
2 Body which falls freely under gravity provides good example of motion under:
A. Uniform acceleration
B. Non-uniform acceleration
C. Uniform velocity
D. None of these
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 A rocket carries its own fuel in the form of
A. liquid only
B. liquid or solid
C. liquid and solid
D. liquid or solid and oxygen
5 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
6 A typical rocket consists of fuel
A. more than 60% of launch mass
B. less than 60% of launch mass
C. less than 80% of launch mass
D. more than 80% of launch mass
7 The direction of the linear momentum is the direction of
A. speed
B. velocity
C. weight
D. none of them
8 The motion in a plane is the motion in
A. one dimension
B. two dimension
C. three dimension
D. four dimension
9 A car travels first half distance between two places with a speed of 30 km/h and remaining half with a speed of 50 km/h. The average speed of the car is
A. 37.5 km/h
B. 10 km/h
C. 42 km/h
D. 40 km/h
10 If the acceleration of a body is negative, then slope of the velocity-time graph will be:
A. Zero
B. Positive
C. Negative
D. Infinity

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