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Ludmilka [50]
3 years ago
11

Mary has a mass of 40 kg and sprints at 1 m/s. How much kinetic energy does she have?

Physics
1 answer:
Sav [38]3 years ago
8 0

Answer:

20 J

Explanation:

Kinetic energy is given as half of the product of mass and the square of velocity of an object:

KE = \frac{1}{2}mv^2

where m = mass = 40 kg

v = velocity = 1 m/s

Hence, Mary's kinetic energy is:

KE = \frac{1}{2} * 40 * 1^2

KE = 20 * 1 = 20 J

She has a kinetic energy of 20 J.

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