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

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

Question # 2

The quantity F x t is called as

Question # 3

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

Question # 4

The motion in a plane is the motion in

Question # 5

The dimension of linear inertia is:

Question # 6

A ball is dropped downwards After 1 second another ball is dropped downwards from the same point. What is the distance between them after 3 seconds

Question # 7

Flight of rocket in the space is an example of

Question # 8

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

Question # 9

A rocket carries its own fuel in the form of

Question # 10

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

Question # 11

The shortest distance between two points directed from its initial point to final point is called:

Question # 12

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

Question # 13

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

Question # 14

A body of weight 1 N has a kinetic energy of 1 joule when its speed is:

Question # 15

Ethanol (alcohol) as a type of:

Question # 16

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

Question # 17

The motion of a projectile is

Question # 18

Acceleration of a body at any particular instant during its motion is known as

Question # 19

Distance covered by a freely failing body n the first second of its motion will be:

Question # 20

Newton's first law is also called:

Question # 21

One KWh is equal to:

Question # 22

Bodies failing freely under gravity provide good example of motion under

Question # 23

The mass of a body measured by a physical balance in a lift at rest is found to be m, if the lift is going up with an acceleration a, its mass will be measured as

Question # 24

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

Question # 25

The decrease in velocity per unit time is called

Question # 26

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?

Question # 27

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 # 28

The path described by a projectile is called its

Question # 29

In an elevator moving vertically up with an acceleration 'g' the force exerted on the floor by a passenger of mass M is

Question # 30

To get a resultant displacement of 10 m, two displacement vectors of magnitude 6 m and 8 m should be combined

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ECAT Physics Chapter 3 Important MCQ's

Sr.# Question Answer
1 If rope of lift breaks suddenly. The tension exerted by the surface of lift is (a=Acceleration of lift)
A. mg
B. m (g+a)
C. m (g - a)
D. 0
2 The direction of the linear momentum is the direction of
A. speed
B. velocity
C. weight
D. none of them
3 The time rate of change of displacement is called:
A. Time
B. Acceleration
C. Speed
D. Velocity
4 In above figures, tell which set of graphs shows that a body is moving with uniform velocity:
A. (i) and (ii)
B. (ii) and (iii)
C. (iii) and (iv)
5 If the acceleration of a body is not uniform, then velocity-time graph will be:
A. Curve
B. Straight line
C. Sphere
D. All of these
6 A body of weight 1 N has a kinetic energy of 1 joule when its speed is:
A. 1.46 m sec-1
B. 2.44 m sec-1
C. 3.42 m sec-1
D. 4.43 m sec-1
7 Change in momentum is one second called.
A. Impulse
B. Force
C. Energy
D. Work
8 If a ball comes back to its starting point after bouncing off the wall several times, then its
A. total displacement is zero
B. average velocity is zero
C. none of them
D. both of them
9 During the projectile motion, the horizontal component of velocity
A. changes with time
B. remains constant
C. becomes zero
D. decreases with time
10 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
A. Zero
B. g
C. -g
D. V + g

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