Question # 1

When a force is applied on a body, several effects are possible Which of the following effect could not occur?

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the body rotates

the body speeds up

the mass of the body decreases

the body changes its direction

Range of a projectile is R, when the angle of projection is 30° . Then, the value of the other angle of projection for the same range, is

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45°

60°

50°

40°

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

When a body is moving with uniform positive acceleration, the velocity- time graph is a straight line. Its slope is

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zero

negative

positive

non-existing

Newton's first law is also called:

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Law of torque

Law of force

Law of inertia

None of these

A stone is dropped from rest from the top of a tower 19.6 m high. The distance traveled during the last second of its fall is (giving g=9.8 m/s^s)

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9.8 m

14.7 m

4.9 m

19.6 m

The artillery shells travel along parabolic paths under the influence of

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magnetic field

electric field

electromagnetic field

gravitational field

A dirty carpet is to be cleaned by heating. This is in according with______law of motion.

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First

Second

Third

None of these

One KWh is equal to:

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3.6 x 10²J

3.6 KJ

3.6 x 10¹KJ

3.6 MJ

The consumption source if energy is:

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Energy from blomass

Hydroelectric energy

Geothermal energy

None of these

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

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Terminal velocity

Orbital velocity

Escape velocity

None of these

Newton's laws are adequate for speeds that are

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low compared with the speed of light

equal to the speed of light

greater than the speed of light

all of them

A dirty carpet is to be cleaned by heating. This is an accordance with____ law of motion:

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First

Second

Third

None of these

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

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?

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4.2 m

8.4 m

12.6 m

none of these

If a train traveling at 72 kmph is to be brought to rest in a distance of 200 meters then its retardation should be

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20 ms^-2

10 ms^-2

2 ms^-2

1 ms^-2

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