Question

Find the increase in the kinetic energy of a body of mass 750g when the speed increases from 6m/s to 8m/s. *

2 points


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Answer 1

Answer:

M=750g(0.75kg)

v1=6m/s

K.E1=1/2mv1^2

1/2×0.75×6*6

1/2×0.75×36

13.5J

V2=8m/s

K.E2=1/2mv1^2

1/2×0.75×8*8

1/2×0.75×64

24J

Increase in K.E.

K.E2-K.E1=24-13.5

10.5J