22-10-2019
Physics

contestada

Question 4. Calculate the kinetic energy of a Year 11 pupil (mass 55Kg)
Swinging on the back of a chair and falling off it with a velocity of 6 m/s.

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22-10-2019

Answer:

990 J

Explanation:

Kinetic energy is:

KE = ½ mv²

Given m = 55 kg and v = 6 m/s:

KE = ½ (55 kg) (6 m/s)²

KE = 990 J

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