Question

# 1. What is the impulse? Give the definition and formula. 2. Calculate the impulse required to...

1. What is the impulse? Give the definition and formula.

2. Calculate the impulse required to stop each moving ball described below.
mA = 4.55 kgvA = 1.5 m/smB = 0.7 kgvB = 9 m/smC = 1.05 kgvC = 4.5 m/smD = 0.84 kgvD = 6.75 m/s
The impulse for ball 'A', ImpA =  Units Select an answer kg m s m/s N*s N/s no units required  .
The impulse for ball 'B', ImpB =  Units Select an answer s kg N*s m N/s m/s no units required  .
The impulse for ball 'C', ImpC =  Units Select an answer N/s m s kg N*s m/s no units required  .
The impulse for ball 'D', ImpD =  Units Select an answer m kg N*s m/s N/s s no units required  .
3. Rank these balls from the hardest to easiest to stop.

D,C,A,B

A,B,D,C

A,B,C,D

C,D,B,A

B,D,A,C

B,C,D,A

1.Impulse J of the force F during a given time is defined as the force multiplied by its applied time.

J = Ft

According to the impulse momentum theorem,Impulse on an object is equal to the change in momentum of the object.

2.Let JA, JB, JC and JD are impulse required to stop the ball A,B,C and D respectively.

JA = mA vA = 4.55*1.5 = 6.825 unit

JB = mB vB = 0.7*9 = 6.3 unit

JC = mC vC = 1.05*4.5 = 4.725 unit

JD = mD vD = 0.84*6.75 = 5.67 unit

3.For more value of impulse,more difficult to stop the ball is. So, rank from hardest to easiest is ABDC

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