Question # 1

Which of the following material lowers friction when pushed between metal plates:

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Water

Fine marble poder

Air

Oil

How much force is needed to body of mass 10 kg from falling:

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100 N

150 N

200 N

300 N

What is the effect of lubricicantion?

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Increase friction

No effect

Reduce friction

None

Weight is measured by:

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Spring balnce

Measuring cylinder

Physical balnce

None of these

The direction of momentum is

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opposite to motion

Along the velocity

Perpendicular to motion

None of these

2nd law of motion is stated as:

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F=m/a

F=ma

F=a/m

F=ma²

In which case it is easy for the tyre to roll over:

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Rough ground

Smooth ground

Same

None

The Atwood machine can be used to find the acceleration due to gravity using the equation

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g = 2 (m1 x m2)/(m1 + m2) a

g = (m1 - m2)/(m1 + m2) a

g = (m1 + m2)/(m1 - m2) a

Product of mass and velocity of a body is called.

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Torque

Force

Work

Momentum

Outer edge of the curved road is elevated to prevent

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Circular motion

Centripetal force

Skidding

Protection

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

If no external force acting on a body then such system is called.

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Ideal system

Controlled system

Isolated system

None

The study of motion without reference to mass and force.

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Mechanics

Dynamics

Kinematics

None of these

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9th Class Physics Chapter 3 Dynamics English Medium KPK Boards Online Mcqs MCQs With Answers

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