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A4 kg bowling ball begins rolling down a at bowling alloy at 6 m/s . When it strikes the pins, it is estimated to be moving at 5 m/s . How much onergy is lost due to friction?

Respuesta :

Answer:

Energy lost due to friction is 22 J      

Explanation:

Mass of the ball m = 4 kg

Initially velocity of ball v = 6 m/sec

So kinetic energy of the ball [tex]KE=\frac{1}{2}mv^2[/tex]

[tex]KE=\frac{1}{2}\times 4\times 6^2=72J[/tex]

Now due to friction velocity decreases to 5 m/sec

Kinetic energy become

[tex]KE=\frac{1}{2}\times 4\times 5^2=50J[/tex]

Therefore energy lost due to friction = 72 -50 = 22 J