A baseball with mass 0.145 kg is moving in the+ y direction with a speed of 2.10

Question

A baseball with mass 0.145 kg is moving in the+y direction with a speed of 2.10m/s, and a tennis ball with mass 0.0570 kg is moving in the-y direction with a speed of 8.80m/s.

What is the magnitude of the total momentum of the systemconsisting of the two balls?

What is the direction of the total momentum of thesystem? +x direction +ydirection     -x direction -y direction A baseball with mass 0.145 kg is moving in the+y direction with a speed of 2.10m/s, and a tennis ball with mass 0.0570 kg is moving in the-y direction with a speed of 8.80m/s.

What is the magnitude of the total momentum of the systemconsisting of the two balls?

What is the direction of the total momentum of thesystem? +x direction +ydirection     -x direction -y direction +x direction +ydirection     -x direction -y direction

Explanation / Answer

The magnitude of total momentum P = m1 u1 + m2 u2                                                        = 0.145 * 2.10 j + 0.0570 * - 8.80 j                                                        = - ( 0.1971 kgm/s) j The magnitude of the momentum P = 0.1971 kg m/s direction along the -y direction.

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