10 of 21 I ned Item 10 Part A James and Sarah stand on a stationary cart with fr

Question

10 of 21 I ned Item 10 Part A James and Sarah stand on a stationary cart with frictionless wheels. The total mass of the cart and riders is 130 kg. At the same instant, James throws a 1.9 kg ball to Sarah at 4.3 m/s, while Sarah throws a 0.52 kg ball to James at 1.5 m/s. James's throw is to the right and Sarah's is to the left, both speeds are measured relative to the ground While the two balls are in the air, what are the speed and direction of the cart and its riders? Consider direction to the right as the positive direction and pay atention to the sign of your answer Express your answer to two significant figures and include the appropriate units. -5.7x102m Correct Part B After the balls are caught, what is the speed of the cart and riders? Consider direction to the right as the positive direction and pay atention to the sign of your answer. Express your answer to two significant figures and include the appropriate units. Submit Erodide Fendack Continue

Explanation / Answer

A) conserving the momentum,

0 = 1.9 x 4.3 - 0.52 x 1.5 + 130v

=> v = -0.056846154 m/s (cart will move to the left with a speed of 0.056846154 m/s)

B) Since no external forces are working on the system, the momentum will still be conserved.

final momentum = 0

=> speed of cart and riders = 0 m/s

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