Forces, Friction & Equilibrium

Apply free-body thinking to friction and statics basics. Ideal for students preparing board exams and competitive tests.

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QUESTION NO 01

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 02

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 03

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 04

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 05

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 06

Weight of a body is?

Answer: mg

Weight W = mg near Earth's surface.

Shahzad Mahota @shahzad-mahota

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QUESTION NO 07

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 08

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 09

Angular momentum of a particle is?

Answer: r × p

L = r × p for a particle about a point.

Shahzad Mahota @shahzad-mahota

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QUESTION NO 10

Hooke's law states that within elastic limit, stress is proportional to?

Answer: Strain

Stress ∝ strain (Hooke's law) within the elastic limit.

Shahzad Mahota @shahzad-mahota

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Forces, Friction & Equilibrium

Escape velocity from Earth's surface is approximately?

Power is defined as?

In an elastic collision,

Friction always acts?

The slope of a velocity–time graph gives?

Weight of a body is?

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

Moment of inertia depends on?

Angular momentum of a particle is?

Hooke's law states that within elastic limit, stress is proportional to?

Published By

Shahzad Mahota

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00

00

00

00

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Forces, Friction & Equilibrium

Escape velocity from Earth's surface is approximately?

Explanation

Power is defined as?

Explanation

In an elastic collision,

Explanation

Friction always acts?

Explanation

The slope of a velocity–time graph gives?

Explanation

Weight of a body is?

Explanation

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

Explanation

Moment of inertia depends on?

Explanation

Angular momentum of a particle is?

Explanation

Hooke's law states that within elastic limit, stress is proportional to?

Explanation

Published By

Shahzad Mahota

00

00

00

00

00

00

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