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

Question # 2

A body of mass 5 kg is acted upon by a constant force of 20 n for 7 seconds. The total change in momentum will be:

Question # 3

Flight of rocket in the space is an example of

Question # 4

During the projectile motion, the horizontal component of velocity

Question # 5

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

Question # 6

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

Question # 7

The artillery shells travel along parabolic paths under the influence of

Question # 8

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:

Question # 9

If speed of electron is 5 x 105m/s. How long does it take one electron to transverse 1 m?

Question # 10

A ball is thrown upwards with a velocity of 100 m/s. It will reach the ground after

Question # 11

A body moving with uniform velocity has

Question # 12

Which quantity has the same units as impulse

Question # 13

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

Question # 14

An aircraft is moving with a velocity of 300 ms-1. If all the forces acting on it are balanced, then

Question # 15

The velocity given to a body to go out of the influence of earth's gravity is known as:

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ECAT Physics Chapter 3 Important MCQ's

Sr.# Question Answer
1 One newton is a force that produces an acceleration of 0.5 m/sec2in a body of mass:
A. 2 Kg
B. 3 Kg
C. 4 Kg
D. 8 Kg
2 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
3 Root out of the conventional source of energy:
A. Energy from biomass
B. Hydroelectric energy
C. Geothermal energy
D. None of these
4 Rocket engines lift a rocket from the earth surface, because hot gas with high velocity
A. Push against the air
B. React against the rocket and push it up
C. Heat up the air which lifts the rocket
D. Push against the earth
5
Swimming becomes possible because of______law of motion:
A. First
B. Second
C. Third
D. None of these
6 A non-inertial frame of reference is that frame of reference in which
A. a = 0
B. a > 0 or a < 0
C. v = 0
D. none of them
7 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
8 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
9 Swimming is based on the principle of
A. Newton's 1st law
B. Newton's 2nd law
C. Newton's 3rd law
D. All
10 The shortest distance between two points directed from its initial point to final point is called:
A. Velocity
B. Displacement
C. Speed
D. Distance

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