Question # 1

The centre of mass of a body

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Lies always inside the body

May lie within, outside or on the surface

Lies always on the surfce of the body

Lies always on the sufrace of the body.

A setallite of mass 'm' is revolving around the earth with an orbital speed 'v' If mass of the satellite is doubled, its orbital speed will become.

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Double

Half

One fourth

Remain the same

For an objec moving with terminal velociyt, its acceleration.

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First increasse than decreases

Is zero

Increass with time

Decrease with time

A uniformly rotating fan is said to be in

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Static equilibrium only

Dynamic equilibrium only

Boh in static and dynamic equilibrium

Not in equilibrium

In stable equilibriu the centre of gravity of the body lies.

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At the highest position

At any position

Outside the body

At the lowest position

A body in equilibrium must not have

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Speed

Velocity

Acceleeration

Quantity of motion

The reason that a car movint on a horizontal road gets thrown out of the road while taking a turn is.

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The reaction of ground

Rolling friction between tyre and road

Lack of sufficient centriptal force

Gravitational force

The correct order of comparison for the terminal speeds of a raindrop snowflake, and hailstone is.

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Raindrop= Snowflake = Hailstone

Rindrop>Snow flake>Hailstone

Hailstone>SRaindrop>Snowflake

Snowflake>FRaindrop>Hailstone

Moment of force is called

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Couple

Moment arm

Torque

Couple arm

It is more difficult to walk on a slippery surface than on a nonslipery one because of

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Lower weight

Increased friction

Reduced friction

High grip

The force that alwyas changes directron of velocity and not its magnitude tis called.

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Electrical force

Centripetal force

Gravitational force

Friction

A cylinder resting on its circulr bases is in

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Neurtral equilibrium

Stable equilibrium

Unsatable equilibrium

None of these three

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