Work, Energy & Power Quiz

Test work–energy theorem, KE, PE, and power concepts. Ideal for students preparing board exams and competitive tests.

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QUESTION NO 01

Work done is zero when force is?

Answer: Perpendicular to displacement

W = F·s·cosθ; if θ = 90°, work is zero.

Shahzad Mahota @shahzad-mahota

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QUESTION NO 02

Kinetic energy of a body of mass m and speed v is?

Answer: (1/2)mv²

Translational kinetic energy K = ½mv².

Shahzad Mahota @shahzad-mahota

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QUESTION NO 03

Momentum is the product of?

Answer: Mass and velocity

Linear momentum p = mv.

Shahzad Mahota @shahzad-mahota

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QUESTION NO 04

Impulse equals the change in?

Answer: Momentum

Impulse J = FΔt = Δp.

Shahzad Mahota @shahzad-mahota

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QUESTION NO 05

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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QUESTION NO 06

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 07

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 08

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 09

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 10

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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@shahzad-mahota

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Work, Energy & Power Quiz

Work done is zero when force is?

Kinetic energy of a body of mass m and speed v is?

Momentum is the product of?

Impulse equals the change in?

Centripetal force is directed?

Gravitational force between two masses is?

Escape velocity from Earth's surface is approximately?

Power is defined as?

In an elastic collision,

Friction always acts?

Published By

Shahzad Mahota

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00

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Work, Energy & Power Quiz

Work done is zero when force is?

Explanation

Kinetic energy of a body of mass m and speed v is?

Explanation

Momentum is the product of?

Explanation

Impulse equals the change in?

Explanation

Centripetal force is directed?

Explanation

Gravitational force between two masses is?

Explanation

Escape velocity from Earth's surface is approximately?

Explanation

Power is defined as?

Explanation

In an elastic collision,

Explanation

Friction always acts?

Explanation

Published By

Shahzad Mahota

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00

00

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