How fast should a person with mass 50kg walk so that his kinetic energy is 625 J?

5 m/s

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0.5 m/s

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5 Km/s

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15 km/s

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Solution

The correct option is A
5 m/s

K.E.=625 J

m=50 kg

Formula:

K.E = ¹/₂ mv²

625 = 0.5 X 50 X v²

v² = 625 / 25 = 25

v = 5 m/s

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How fast should a person with mass 50kg walk so that his kinetic energy is 625 J?

The correct option is A 5 m/s K.E.=625 J m=50 kg Formula: K.E = 1/2 mv2 625 = 0.5 X 50 X v2 v2 = 625 / 25 = 25 v = 5 m/s

The correct option is A
5 m/s

K.E.=625 J

m=50 kg

Formula:

K.E = ¹/₂ mv²

625 = 0.5 X 50 X v²

v² = 625 / 25 = 25

v = 5 m/s