1. A 1kg ball with velocity 20m/s bounces perpendicularly offa wall so it has th

Question

1. A 1kg ball with velocity 20m/s bounces perpendicularly offa wall so it has the same speed afterward if the average force is20000N then how long in milliseconds did the collisiontake? a) 1000 ms b) 10 ms c) 5 ms d) 2ms
2. A .5 kg ball, traveling 20 m/s, is struck by a bat,imparting an impulse of 50 Ns in the opposite direction. Findthe speed of the ball after being struck. a) 50m/s    b) 20 m/s c) 30 m/s d) 80 m/s 1. A 1kg ball with velocity 20m/s bounces perpendicularly offa wall so it has the same speed afterward if the average force is20000N then how long in milliseconds did the collisiontake? a) 1000 ms b) 10 ms c) 5 ms d) 2ms
2. A .5 kg ball, traveling 20 m/s, is struck by a bat,imparting an impulse of 50 Ns in the opposite direction. Findthe speed of the ball after being struck. a) 50m/s    b) 20 m/s c) 30 m/s d) 80 m/s

Explanation / Answer

change in momentum of the ball=1*20-(-1*20)=40kgm/sec the impulse on the ball is F*t where F is the average force so t=40/20000=2ms b)change in momentum of the ball is 50Ns final momentum-(-initial momentum)=50Ns as they are in opposite direction final speed=80m/sec

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.