Question # 1

If the velocity of body decreases with time then acceleration will be.

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Positive

Negative

Variable

Uniform

In ___________ (CFC) was found reacting with ozone.

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1920s

1970s

1950s

1960s

1 nm have meters.

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10^-3 m

10^-6 m

10^-9 m

10^-10m

The work done will be zero when the angle between the force and the displacement is:

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45°

60°

90°

180°

Perpendicular / hypotenuse is equal to:

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Cosθ

Tanθ

Cosecθ

Sinθ

Amount of substance in terms of numbers is measured in.

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gram

Kilogram

Newton

Mole

Cos 0°=

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0.5

1

0.866

0

The formula of y component of force ' F ' is:

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F cos 𝜽

F Sin 𝜽

F tan 𝜽

Tan^-1 𝜽

When a hammer raised up its energy will be:

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Mechanical energy

Gravitational potential energy

Chemical energy

Nuclear energy

At the surface of the earth value of 'g' is measured by using formula:

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g=GMe/R

g = GMe/R²

g = 2GMe/R²

g = GMe/2 R

The energy present in our food is:

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Mechanical energy

Gravitational potential energy

Chemical energy

Nuclear energy

The forces that are parallel to each other and have the same direction are called:

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Like parallel forces

Unlike parallel forces

Resultant forces

Net forces

A body is placed at height 'h' above the surface of the Earth.The value of 'g' is given by

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gh = Me/(R + h)2

gh = GMe/(R +h)2

gh = GMe/R2h

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