A 7.0 kg bowling ball moves at 2.30 m/s. How fast must a 2.00 g Ping-Pong...

Question

Question

A 7.0 kg bowling ball moves at 2.30 m/s. How fast must a 2.00 g Ping-Pong ball move so that the two balls have the same kinetic energy?

science physics

Answer 1

Answer #1

Mass of the bowling ball = m₁ = 7 kg

Speed of the bowling ball = V₁ = 2.3 m/s

Mass of the ping-pong ball = m₂ = 2 g = 0.002 kg

Speed of the ping-pong ball = V₂

Both the balls have the same kinetic energy.

m₁V₁²/2 = m₂V₂²/2

m₁V₁² = m₂V₂²

(7)(2.3)² = (0.002)V₂²

V₂² = 18515

V₂ = 136.07 m/s

The ping pong ball must move at a speed of 136.07 m/s to have the same kinetic energy as the bowling ball.

Answer 2

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