Question

If the kinetic energy of a particle is increased by 300%, the
velocity of the particle will increase by
(a) 20% (b) 200% (c) 100% (d) 50%

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Answer 1

Answer:

% change in v =  100 %

Explanation:

suppose K.E is represented by K

K' = K + 300% K

K' = K + 3 K

K' = 4 K

1/2 mv'² = 4x1/2 mv²

     v'² = 4 v² ⇒ v' = 2 v

% change in v = v' - v / v x 100 %

% change in v = 2v - v / v x 100 %

% change in v =  100 %