1. Calculate the momentum and kinetic energy of a 3200 N car that moves north at...

1. Calculate the momentum and kinetic energy of a 3200 N car that moves north at 60 km / h.

2. What is the momentum of a 0.003 kg bullet that moves at 600 m / s in a direction at 30 ° above the horizontal? What are the vertical and horizontal components of the moment?.

3. A 2500 Kg truck moves at 40 m / s crashes into a brick wall and stops within 0.2 s. a) What is the value of its momentum? b) Find the average force on the truck during that impact.

4. A 0.2 kg baseball reaches the batter with a speed of 80 m / s. After being hit, it leaves at 110 m / s in the opposite direction. If the ball exerts an 1890 N force, how long was it in contact with the bat?

5. A train weighing 8x10 ° N travels at a speed of 60 m / s. How much momentum will the train exert to stop?

6. Two children of 80 and 50 kg are standing on roller skates. If the child of greater mass pushes the child in such a way that the child moves away at 6 m / s. What will be the velocity of the child with the greatest mass?

7. A 24 g bullet is fired at a speed of 900 m / s by a 5 kg rifle. Find the recoil speed of the rifle. Find the kinetic energy of the bullet with the rifle before and after the crash.

Expert Solution

genius_generous answered 7 months ago

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