Question # 1

Angular momentum

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Scalar

Axial vector

Polar vector

At 45° angle

Two bullets are fired simultaneously, horizontally and with different speeds from the same place. Which bullet will hit the ground first?

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The faster one

Depends on their mass

The slower one

Both will reach simultaneously

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

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a rocket

an aeroplane

a projectile

a ballon

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:

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10 NS

100 NS

140 NS

200 NS

Ethanol (alcohol) as a type of:

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Electric fuel

Bio fuel

Nuclear fuel

None of these

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

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maximum

Minimum

Zero

Unity

The direction of the linear momentum is the direction of

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speed

velocity

weight

none of them

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

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80 m

20 m

160 m

40 m

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

If two bodies of equal masses moving in the same direction collide elastically, then their velocities.

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Are added

Are subtracted

Do not change

Are exchanged

The time rate of change of displacement is called:

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Time

Acceleration

Speed

Velocity

Unit of impulse in

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Newton

Kg m

Kg m/s

Joule

A person is sitting in a traveling train and facing the engine. He tosses up a coin and the coin falls behind him. It can be concluded that the train is

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Moving forward and gaining speed

Moving forward and losing speed

Moving forward with uniform speed

Moving backward with uniform speed

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

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10 s

20 s

5 s

40 s

The second law gives the relationship between

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mass and velocity

force and acceleration

velocity and acceleration

mass and weight

Flight of rocket in the space is an example of

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Newton's first law

Newton's third law

Newton's second law

all of them

A typical rocket consumes about

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100 kg s^-1of fuel

1000 kg s^-1of fuel

10000 kg s^-1of fuel

100000 kg s^-1of fuel

If m means mass of gases objected per second from a rocket and v shows the change in velocity, than mv is named as:

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Force

Energy

work

impulse

A body moving with an acceleration of 5 m/sec²started with velocity of 10 m/sec. What will be the distance traversed in 10 seconds?

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150 m

250 m

350 m

400 m

The dimension of linear inertia is:

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MLT²

ML⁰T^-2

ML⁰T⁰

MLT^-1

A body of mass 1.0 kg is falling with an acceleration of 10 m/s². Its apparent weight will be (g=10 m/s²)

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1.0 kg wt

2.0 kg wt

0.5 kg wt

Zero

Rate of change of momentum is called

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Impulse

Force

Torque

Momentum

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