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

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

Question # 2

Work done along a closed path in a gravitational field is:

Question # 3

In the expression F x t, the force F is

Question # 4

If the acceleration of a body is not uniform, then velocity-time graph will be:

Question # 5

Biomass includes:

Question # 6

An object thrown upward with an initial velocity at certain angle with the horizontal and moving freely under the action of gravity is called

Question # 7

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

Question # 8

Force is a:

Question # 9

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

Question # 10

An object is dropped from a height of 100 m. Its velocity at the moment it touches the ground is:

Question # 11

The dimension of linear inertia is:

Question # 12

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

Question # 13

Earth is considered to be

Question # 14

When the surfaces are coated with a lubricant, then they

Question # 15

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

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ECAT Physics Chapter 3 Important MCQ's

Sr.# Question Answer
1 The magnitude of the displacement is a line from initial position to final position which is
A. straight
B. curved
C. either be curved or straight
D. none of them
2 A ball falls on the surface from 10 m height and rebounds to 2.5 m. if the duration of contact with the floor is 0.01 seconds then the average acceleration during contact is
A. 2100 m/s2
B. 1400 m/s2
C. 700 m/s2
D. 400 m/s2
3 For a given angle of projection, if the time of flight of a projectile is doubled, the horizontal range will increases to
A. Four times
B. Thrice
C. Once
D. Twice
4 If d is the displacement of the body in time t, then its average velocity will be
A. Vav= d x t
B. Vav = t/d
C. Vav = d/t
D. Vav = d/t
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 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
7 The mass of the object is a quantities measure of its
A. speed
B. velocity
C. acceleration
D. inertia
8 A railway engine (mass 104kg) is moving with a speed of 73 km/h. The force which should be applied to bring it to rest over a distance of 20 m is
A. 3,600 N
B. 7,200 N
C. 10,000 N
D. 100,000 N
9 Acceleration produced in a body by a force varies
A. inversely as the applied force
B. directly as the applied force
C. directly as the mass of the body
D. none of them
10 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

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