5. Granny whizzes around the rink and is suddenly confronted with Ambrose at res

Question

5. Granny whizzes around the rink and is suddenly confronted with Ambrose at rest directly in her path. Rather than knock him over, she picks him up and continues in motion without "braking." Consider both Granny and Ambrose as two parts of one system. Since no outside forces act on the system, the momentum of the system before collision equals the momentum of the system after collision a. Complete the before-collision data in the table below BEFORE COLLISION Gronny's mass Gronny's speed Gronny's momentum Ambrose's mass Ambroses speed Ambroses momentum Total momentum 80 kg 3 m/s 40 kg 0 m/s b. After collision, Granny's speed [increases] [decreases] c. After collision, Ambrose's speed [increases] [decreases] d. After collision, the total mass of Granny + Ambrose is e. After collision, the total momentum of Granny +Ambrose is . f. Use the conservation of momentum law to find the speed of Granny and Ambrose together after collision. (Show your work in the space below.) New speed

Explanation / Answer

a) Granny Momentum =80*3 =240 kg-m/s

Ambrose Momentum=40*0=0

Total Momentum=240 Kg-m/s

Momentum before collison= Momentum after collison

240=(80+40)V

v=2 m/s (Combined speed)

b) Granny speed deceased from 3 to 2

c) Ambrose speed increases from 0 to 2

d) Total Mass =120 kg

e)Total momentum=240 Kg-m/s

f) Momentum before collison= Momentum after collison

240=(80+40)V

v=2 m/s (New speed)

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