Gina (m G =60 kg) and Heidi (m H =50 kg) are sitting on a cart at rest (m Cart =

Question

Gina (mG=60 kg) and Heidi (mH=50 kg) are sitting on a cart at rest (mCart = 40 kg)(Gina and Heidi are fixed to the cart, which pushes and pulls them along with the cart). Gina throws a ball (mball=1.5 kg) to Heidi. Just after throwing the ball, Gina has a velocity of 0.3 m/s to the left.

4) Gina (mG 0 kg) and Heidi m 50 kg) are sitting on a cart at rest (mcart 40 kgGina and Heidi are fixed to the cart, which pushes and pulls them along with the cart). Gina throws a ball (bll1.5 kg) to Heidi. Just after throwing the ball, Gina has a velocity of 0.3 m/s to the left. Before: i After: Which systems have horizontal momentum conserved from the time just after Gina throws the ball until after Heidi catches the ball? Only Gina Only Heidi Only the Ball Only the Cart Gina + Heidi + Cart + Ball Submit 5) After Gina throws the ball, what is the balls momentum O18 kg m's to the left 30 kg m/s to the left 0.45 kg m/s to the left 45 kg m/s to the left 18 kg m/s to the right 30 kg m/s to the right 0.45 kg m/s to the right 45 kg m/s to the right Submit

Explanation / Answer

4) Gina+Heidi+cart+ball system

5) 45kgm/s towards right.

Mass of Gina+ Heidi+cart = 60+50+40 = 150 kg

Speed = 0.3 m/s towards left. Hence the moment of these three is 150*0.3= 45 kgm/s towards left.

Hence ball has 45 kgm/s towards right.

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