Question # 1

The formula of torque is:

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L= F x E

E = F x t

t = F x L

E = F x L

Steam is used to run machine because of high amount of ___________ heat.

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Latent

Great

Large

Nil

Convection of heat is the process of heat transfer due to the

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Random motion of molecules

Downward movement of molecules

Upward movement of molecules

Free movement of molecules

The work done in lifting a brick of mass 2 kg through a height of 5 m above the ground will be:

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2.5 J

12.5 J

50 J

100 J

A car starts from rest. It acquires a speed of 25 ms^-1after 20 s. The distance moved by the car during this time is

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31.25 m

250 m

5000 m

500 m

A couple is formed by

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Two forces perpendicular to each other

Two like parallel forces

Two equal and opposite forces in the same line

Two equal and opposite forces not in the same line

According to law of conservation of energy increases in P.E is equal to:

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Increase K.E

Decrease in K.E

Decrease in P.E

None

The direction of momentum is

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opposite to motion

Along the velocity

Perpendicular to motion

None of these

Gravitational force is a:

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Electric force

Magnetic force

Reactional force

Electromotive force.

What is mass of body if W = 580 N ?

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5.8 Kg

0.58 kg

0.058 kg

58 kg

Co-efficient of friction between iron and iron is:

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1.0

0.62

0.9

1.2

When a substance is changed from its solid state to liquid state by adding heat, the process is called

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Melting

Fusion

Freezing

A and B both

The velocity and acceleration of the body moving with uniform speed in a circular path will be:

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In same direction

In opposite direction

Mutually perpendicular

Equal

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