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16-07-2020
Physics

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the speed of a bullet of mass 20 g is 216 kilometre-per-hour what is kinetic energy in joules

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23-07-2020

Answer:

2160joules

Explanation:

M = 20g = 0.02kg

V = 216km/h

K.E = 1/2 m (v)^2 = 1/2 × 0.02 × 216

K.E = 2.16kj

1kj = 1000joules

2.16kj = 2160joules

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