A canoeist on a lake throws a 0.145 kg baseball at 20.0 m/s to a friend in a different canoe. Each canoe with its contents has a mass of 120 kg, and is at rest initially. How fast is the first canoe moving after the pitch, assuming no friction with the water?

Question

Layla Baird

Physics

24 June, 08:22

A canoeist on a lake throws a 0.145 kg baseball at 20.0 m/s to a friend in a different canoe. Each canoe with its contents has a mass of 120 kg, and is at rest initially. How fast is the first canoe moving after the pitch, assuming no friction with the water?

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Salvatore May · Answer 1

This can be solve using momentum, where momentum = mv

where m is the mass of the object

and v is the velocity of the object

m1v1 + m2v2 = mfvf

(0.145 kg) (20 m/s) + (120 kg) (0 m/s) = (120 + 0.145 kg) vf

solve for vf

2.9 = 120.145vf

vf = 0.024 m/s