Question # 1

A body of mass 5 kg is acted upon by a total change n momentum will be:

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10 NS

100 NS

140 NS

200 NS

A train of 150 m length is going towards north direction at a speed of 10 ms^-1. A parrot files at a speed of 5 ms^-1towards south direction parallel to the railway track. The time taken by the parrot to cross the train is equal to

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12 s

8 s

15 s

10 s

One KWh is equal to:

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3.6 x 10²J

3.6 KJ

3.6 x 10¹KJ

3.6 MJ

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

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Velocity

Average speed

Average velocity

None of these

Body which falls freely under gravity provides good example of motion under:

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Uniform acceleration

Non-uniform acceleration

Uniform velocity

None of these

The time rate of change of displacement is called:

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Time

Acceleration

Speed

Velocity

When a bicycle is in motion but not pedaled, the force of friction exerted by the ground on the two wheels is such that it acts

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In the backward direction on the front wheel and in the forward direction on the rear wheel

In the forwards directions on the front wheel and in the backward direction on the rear wheel

In the forward direction on both the wheels

In the backward direction on both the wheels

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

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1.46 m sec^-1

2.44 m sec^-1

3.42 m sec^-1

4.43 m sec^-1

Root out the conventional source of energy:

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Energy from blomass

hydroelectric energy

Geothermal energy

None of these

Swimming becomes possible because of______law of motion:

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First

Second

Third

None of these

The direction of the linear momentum is the direction of

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speed

velocity

weight

none of them

Earth is considered to be

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a non-inertial frame

an inertial frame

an accelerated frame

none of the above

A lift is moving up with acceleration equal to 1/5 of that due to gravity. The apparent weight of a 60 kg man standing in lift is

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60 kg wt

72 kg wt

48 kg wt

Zero

Which of the following is not a projectile

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a bullet fired from a gun

a space ship

a football in air

an artillery shell

Graphs which are used to illustrate the variation of velocity of an object with time are called

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distance time graphs

speed time graphs

velocity time graphs

acceleration time graphs

A ball is dropped from a certain height and another ball is projected horizontally from the same point. Which of the following statement is correct?

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Both hit the ground at the same veloctiy

Both hit the ground at the same speed

The change of velocity during the path for both balls is the same

The change of speed during the path for both balls is the same

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ECAT Physics Chapter 3 Motion and Force Online Test MCQs With Answers

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