1. pnicole

ugh, i'm sorry! The file won't upload!

2. pnicole

|dw:1316959273911:dw|

3. pnicole

I need to find momentum before, velocity after and momentum after.

4. pnicole

Granny whizzes around the rink and is suddenly confronted with a girl at rest directly in her path. Rathe than kocking her over, she picks her up and continues in motion without "braking" Data: Granny's mass: 50kg Granny's Vi: 3 m/s Girl's mass: 25 kg Girl's Vi: 0 m/s What is their momentum before and after?

5. UnkleRhaukus

Apply conservation of momentum Scenario 1 momentum before is mv = 50kgx3m/s +25kgx0m/s = 150kg.m/s -> momentum after is mv = 50kgx0m/s + 25kgxAm/s solving, A = (150kg.m/s) / (25kg) = 6 m/s

6. UnkleRhaukus

Granny's Vi, 2 or 3, i was looking at the picture

7. pnicole

Oh, I'm sorry. I forgot to say that the mass of the ones in the picture are 200 kg.

8. pnicole

It's different from Granny

9. UnkleRhaukus

well im glad nobody's granny weighs that much on ice skates also, why three sets of data?