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 body is dropped from a tower with zero velocity, reaches ground in 4s. The height of the tower is about

Question # 2

A man sitting in a bus travelling in a direction from west to east with a speed of 40 km/h observes that the rain drops are falling vertically down. To the another man standing on ground the rain will appear

Question # 3

When two protons are brought closer potential energy of both of them:

Question # 4

What must be changing when a body is accelerating uniformly?

Question # 5

Essential characteristic of equilibrium is

Question # 6

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

Question # 7

Change in momentum is one second is called:

Question # 8

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 # 9

The consumption source if energy is:

Question # 10

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 # 11

A ball is dropped from a height of 4.2 meters. To what height will take it rise if there is no loss of KE after rebounding?

Question # 12

Blomass includes:

Question # 13

Acceleration of a body is positive, if the velocity of the body is

Question # 14

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

Question # 15

Laws of motion are not valid in a system which is

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ECAT Physics Chapter 3 Important MCQ's

Sr.# Question Answer
1 The vertical component of velocity of a projectile during its motion is minimum
A. at the time of projection
B. at the highest point
C. just before hitting the plane of projection
D. all of them
2 Slope of velocity-time graph represents:
A. Acceleration
B. Speed
C. Torque
D. Work
3 If m is the mass of the gases ejected per second with velocity v relative to the rocket of mass M, then the acceleration of rocket is
A. a = M/mv
B. a = mM/v
C. a = mv/M
D. a = v/mm
4 The shortest distance between two points directed from its initial point to final point is called:
A. Velocity
B. Displacement
C. Speed
D. Distance
5 If an iron ball and a wooden ball of the same radius was released from a height 'h' in vacuum, then time taken by both of them to reach ground will be
A. Unequal
B. Exactly equal
C. Roughly equal
D. Zero
6 Which quantity has the same units as impulse
A. force
B. work
C. linear momentum
D. acceleration
7 An object thrown upward with an initial velocity at certain angle with the horizontal and moving freely under the action of gravity is called
A. a rocket
B. an aeroplane
C. a projectile
D. a ballon
8 If speed of electron is 5 x 105m/s. How long does it take one electron to transverse 1 m?
A. 1 x 106
B. 2 x 106
C. 2 x 105
D. 1 x 105
9 At the top of the trajectory of a projectile the acceleration is
A. The maximum
B. The minimum
C. Zero
D. g
10 The quantity F x t is called as
A. momentum
B. velocity
C. acceleration
D. impulse

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