A baseball (mass 0.145 kg) is at rest in a mesh net above the ground. A 0.023 kg

Question

A baseball (mass 0.145 kg) is at rest in a mesh net above the ground. A 0.023 kg marshmallow is thrown at the baseball from directly below, and attaches itself to the ball, without hitting the net, while traveling at a speed of 3.90 m/s. How high above its starting position does the baseball-marshmallow combination rise? A baseball (mass 0.145 kg) is at rest in a mesh net above the ground. A 0.023 kg marshmallow is thrown at the baseball from directly below, and attaches itself to the ball, without hitting the net, while traveling at a speed of 3.90 m/s. How high above its starting position does the baseball-marshmallow combination rise?

Explanation / Answer

using linear momentum conservation

m1u1 + m2u2 = (m1+m2)vf

u1 = 0

vf = m2u2/(m1+m2)

vf = 0.534 m/s

enery remain conserve

1/2 vf^2 = gh

h = 0.0145 m

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