Question

A bullet of mass 20 g is found to pass between two points 30 m apart in 4 s. Assuming its speed kinetic energy gained by the body, g = 9.8 m/s.​

Answer 1

Answer:

from the formula of  speed=timedistance

thus speed(v)=430

thus v=7.5m/s

since K.E=21mv2

                   ⇒21×100020×7.5×7.5(divide by 1000 because mass is in grams)

                   ⇒169J

                   ⇒0.5625J

Explanation:

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