Circular Motion & Gravitation

Cover centripetal force, orbital ideas, and escape velocity. Ideal for students preparing board exams and competitive tests.

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QUESTION NO 01

Moment of inertia depends on?

Answer: Mass distribution about the axis

I depends on how mass is distributed relative to the rotation axis.

Shahzad Mahota @shahzad-mahota

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QUESTION NO 02

For free fall (neglecting air resistance), acceleration is?

Answer: g downward

All freely falling objects accelerate at g ≈ 9.8 m/s² downward.

Shahzad Mahota @shahzad-mahota

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QUESTION NO 03

Weight of a body is?

Answer: mg

Weight W = mg near Earth's surface.

Shahzad Mahota @shahzad-mahota

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QUESTION NO 04

The slope of a velocity–time graph gives?

Answer: Acceleration

a = dv/dt, so the slope of v–t is acceleration.

Shahzad Mahota @shahzad-mahota

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QUESTION NO 05

Friction always acts?

Answer: Opposite to the relative motion (or tendency)

Kinetic friction opposes relative sliding; static friction opposes the tendency to slide.

Shahzad Mahota @shahzad-mahota

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QUESTION NO 06

In an elastic collision,

Answer: Both momentum and kinetic energy are conserved

Perfectly elastic collisions conserve both momentum and kinetic energy.

Shahzad Mahota @shahzad-mahota

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QUESTION NO 07

Power is defined as?

Answer: Rate of doing work

Power P = W/t (or F·v).

Shahzad Mahota @shahzad-mahota

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QUESTION NO 08

Escape velocity from Earth's surface is approximately?

Answer: 11.2 km/s

Escape speed from Earth is about 11.2 km/s.

Shahzad Mahota @shahzad-mahota

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QUESTION NO 09

Gravitational force between two masses is?

Answer: Always attractive

Newton's law of gravitation is always attractive.

Shahzad Mahota @shahzad-mahota

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QUESTION NO 10

Centripetal force is directed?

Answer: Towards the centre of the circle

Centripetal force always points toward the centre of circular motion.

Shahzad Mahota @shahzad-mahota

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430 Questions

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Shahzad Mahota

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Circular Motion & Gravitation

Moment of inertia depends on?

For free fall (neglecting air resistance), acceleration is?

Weight of a body is?

The slope of a velocity–time graph gives?

Friction always acts?

In an elastic collision,

Power is defined as?

Escape velocity from Earth's surface is approximately?

Gravitational force between two masses is?

Centripetal force is directed?

Published By

Shahzad Mahota

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00

00

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Circular Motion & Gravitation

Moment of inertia depends on?

Explanation

For free fall (neglecting air resistance), acceleration is?

Explanation

Weight of a body is?

Explanation

The slope of a velocity–time graph gives?

Explanation

Friction always acts?

Explanation

In an elastic collision,

Explanation

Power is defined as?

Explanation

Escape velocity from Earth's surface is approximately?

Explanation

Gravitational force between two masses is?

Explanation

Centripetal force is directed?

Explanation

Published By

Shahzad Mahota

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00

00

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