Question

find the mass of a body which has 5J of K.E while moving at a speed af 2m/s

Answer 1

Wkt ,

K.E=1/2mv^2

GIVEN,,

K.E=5j

V=2m/s

Now,

5=1/2×m×4

5=2m

m=5/2

m=2.5g

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