Question # 1

Dot product of vector with itself is.

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Zero

2 A

A²

A

The formula of centripetal acceleration is

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A ball is thrown up vertically, it takes 3 sec to reach maximum height. Its initial velocity is.

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10 ms-1

12.2 ms-1

15 ms-1

29.4 ms-1

If a body revolves under centripetal force its angular acceleration is

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Non zero

Variable

Increasing

Zero

The dimensional of potential energy per unit volume are same as that of.

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Work

Pressure

Speed

Density

In S.H.M, the acceleration of the body is directly proportional to

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Weight of body

Applied force

Amplitude

Displacement

Which of the following is the derived quantity.

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Time

Length

Area

Mass

An athlete runs with a speed of 12 ms-1. Determine the longest jump he can undertake.

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12 m

14.4 m

24 m

16.2 m

The ratio of the velocities of wate in a pipe lying horizontally at two ends is 1 : 4 The ratio of diameters of pipe at these two ends is.

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1 : 2

2 : 1

1 : 4

4 : 1

The law of conservation of mass gives us

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Equation of continuity

Stock's law

Bernoulli's equation

Viscosity

the change in internal energy is defined as

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Q - W

Q-T

Q + P

Q - P

An elevator is moving up with an acceleration equal to 'g' An apparent weight of the body in an elevator is.

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Zero

Equal to real weight

2 mg

3 mg

Star moving towards the earth show

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Red shift

Blue shift

Green shift

Yellow shift

The density of blood is nearly equal to.

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Air

Milk

Honey

Water

For a diatomic gas Cv= 5R/2 then gamma for this gas is.

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5/7

4/35

7/5

35/4

When average velocity becomes equal to instantaneous than body is called moving with.

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Instantaneous acceleration

Constant acceleration

Constant velocity

Variable velocity

If heat is added to a system, then its entropy will.

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Increases and positive

Decrease and positive

Increases but negative

Decreases but negative

the shortest distance between two points is called.

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Speed

Acceleration

Distance

Displacement

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