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

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

When a body is moving on a surface, the force of friction is called

Question # 4

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

Question # 5

Tick the conservation force:

Question # 6

The instantaneous velocity is define as the limiting value of Δd/Δt on the time intervalΔt approaches to

Question # 7

When body moves with increasing acceleration, its velocity time graph is a

Question # 8

A monkey sits on the pan of spring scale kept in an elevator. The reading of the spring scale will be maximum when

Question # 9

What must be changing when a body is accelerating uniformly?

Question # 10

The path described by a projectile is called its

Question # 11

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

Question # 12

The time rate of change of displacement is called:

Question # 13

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

Question # 14

An object thrown in arbitrary direction in space with an initial velocity and moving freely under gravity will follow

Question # 15

The time of flight of a projectile motion equal to

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ECAT Physics Chapter 3 Important MCQ's

Sr.# Question Answer
1 An inertial frame of reference is that frame of reference in which
A. a = 0
B. a > 0
C. a < 0
D. all of them
2 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
A. m (1 - a/g)
B. m (1 + a/g)
C. m
D. Zero
3 Acceleration produced in a body by the 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
4 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
5 When a body is moving with uniform positive acceleration, the velocity- time graph is a straight line. Its slope is
A. zero
B. negative
C. positive
D. non-existing
6 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
7 An aircraft is moving with a velocity of 300 ms-1. If all the forces acting on it are balanced, then
A. It still moves with the same velocity
B. It will be just floating at the same point in space
C. It will be fall down instantaneously
D. It will lose its velocity gradually
8 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
9 The magnitude of the force producing an acceleration of 10 m/sec2in a body of mass 500 grams is:
A. 3 N
B. 4 N
C. 5 N
D. 6 N
10 The quantity F x t is called as
A. momentum
B. velocity
C. acceleration
D. impulse

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