Question # 1

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

Parallel forces are those whose:

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^{Times of action are parallel}

Points of action are different

More than one forces

All of the given option

_____________ is related to earth attractive force.

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Centre of gravity

Acceleration

Velocity

Nil

Two equal but unlike parallel forces having different lines of action produce:

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a Torque

a couple

Equilibrium

Netural equilibrium

A body is said to be in __________ equilibrium if after a slight tilt return to its previous position:

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Stable

Unstable

Neutral

None

If Fx and Fy are rectangular components of a vector F, then the magnitude of vector F is:

[LHR-04 1st G]

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The centre of gravity of hollow cylinder is the middle point on its:

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Curved side

axis

Bottom

On upper side

Clockwise torque is taken:

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Positive

Negative

Neutral

Nil

Which is not an example of torque?

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Opening a nut

Door opening

Picking up a toy

All of them

Resultant vector can be found by:

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θ=tan^-1 Fy/ Fx

θ=tan[Fy/ Fx ]

θ=tan^-1[ Fy/ Fj ]

None of these

Sin 45 is equal to:

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Zero

0.5

0.707

1

ΣF=0 is __________ condition of equilibrium:

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1st

2nd

Unstable

Stable

A body is in equilibrium when its

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Acceleration is uniform

Speed is uniform

Speed and acceleration are uniform

Acceleration is zero

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Physics 9th Class English Medium Unit 4 Online Test MCQs With Answers

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