The formula for kinetic energy is MCQ with Answer and Explanation

Question Report Error

The formula for kinetic energy is

A. ma

B. mv

C. mgh

D. ½mv²

Answer: Option D

Solution (By JKExamLibrary)

Kinetic energy due to motion. Potential mgh. Momentum mv. Force ma. Work-energy theorem: W = ΔK. Units Joules.

This question belongs to: Science Physics

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Practice More Physics Questions

Question #1 Report Error

A step-down transformer has turns ratio 10:1. Input voltage 220 V, output voltage is

A. 22 V

B. 440 V

C. 2200 V

D. 110 V

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Correct Answer: Option A

Explanation:
Vs/Vp = Ns/Np = 1/10 => Vs = 220/10 = 22 V.

This question belongs to: Science Physics

Question #2 Report Error

The part of human eye that controls amount of light entering is

A. Lens

B. Cornea

C. Retina

D. Iris

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Correct Answer: Option D

Explanation:
Iris adjusts pupil size. In bright light pupil constricts, dim light dilates. Retina forms image. Cornea and lens focus. Eye is like camera.

This question belongs to: Science Physics

Question #3 Report Error

Escape velocity from a planet depends on

A. Mass of escaping body

B. Density of atmosphere

C. Radius of planet only

D. Mass and radius of planet

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Correct Answer: Option D

Explanation:
v_esc = √(2GM/R), depends on planet's mass and radius, not body's mass.

This question belongs to: Science Physics

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