A 70kg man runs at a pace of 4 m/s and a 50g meteor travels at 2 km/s. Which has the most kinetic energy?.( Find kinetic energies of both the man and meteor and compare them.
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Answer:
so KE of a man is significantly greater than KE of meteor.
Explanation:
since kinetic energy KE=1/2mv²
therefore KE of man=1/2(70)(4)(4)
=1/2(70)(16)
=70(8)
=560 J
KE of meteor=1/2(50/1000)×2(5/18)
=1/2(1/20)(5/9)
=5/360
=1/75 J
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