Physics, asked by Anonymous, 10 months ago

1. A ball of mass 100 g moving with a speed of
72 km per hour is hit by a bat that changes its
speed to 144 km per hour. Find the change
in the kinetic energy of the ball.
2. If the mass of a block is increased four times,
find the factor by which its speed should
change so that its kinetic energy remains the
same.

PLZZ solve these without spamming

Answers

Answered by Anonymous

Answer:

Your answer is here:-

m = 100g = 0.1 kg

u = 72 km/hr => 20 m/s

v = 144 m/s => 40 m/s K.E.=> 1/2 × 1/10 × ( 1600-400)

K.E.=> 1/20 × 1200

K.E.=> 60 Joule ans.

Answered by Anonymous

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