Question

A truck of mass 2kg traverse at 8m\s towards a stationary truck of 6kg after colliding the truck stick and move together . what is sound energy was given out during collision?????

Answer 1

Answer:

48J

Explanation:

Since the trucks stick together after collision, energy is not conserved. I.e the loss of kinetic energy appears as sound energy.(assuming no loss of energy in other forms)

Conserving momentum:

8(2)+6(0)=(6+2)V

V=2m/s

Calculating loss of energy;

1/2(2)(8)^2-1/2(6+2)(2)^2=64-16=48J

Therefore the sound energy produced during the collision is 48J

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