hi, i have 5 questions i need the complete solutions with their final results. i

Question

hi,



i have 5 questions i need the
complete solutions with their final results. is there anyone couldhelp
me, i would appreciate that.







1)
A 0.12-kg ball is moving at 6 m/s when it is hit by a bat, causingit to reverse direction and have a speed of 14 m/s. What is thechange in the magnitude of the momentum of the ball?








2)

Alex throws a 0.15-kg rubber ball down onto the floor. The ball'sspeed just before impact is 6.5 m/s, and just after is 3.5 m/s. Ifthe ball is in contact with the floor for 0.025 s, what is themagnitude of the average force applied by the floor on theball?







3)

Lonnie pitches a baseball of mass 0.20 kg. The ball arrives at homeplate with a speed of 40 m/s and is batted straight back to Lonniewith a return speed of 60 m/s. If the bat is in contact with theball for 0.050 s, what is the impulse experienced by the ball?








4)

A ball with original momentum +4.0 kg?m/s hits a wall and bouncesstraight back without losing any kinetic energy. The change inmomentum of the ball is:







5)

A machine gun is attached to a railroad flatcar that rolls withnegligible friction. If the railroad car has a mass of 6.25 ? 104kg, how many bullets of mass 25 g would have to be fired at 250 m/soff the back to give the railroad car a forward velocity of 0.5m/s?







thank you in advance

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