A boy on a 2.4 kg skateboard initially at rest tosses a(n) 7.9 kg jug of water in the forward direction. . .   If the jug has a speed of 2.6 m/s relative to the ground and the boy and skateboard...

A boy on a 2.4 kg skateboard initially at rest tosses a(n) 7.9 kg jug of water in the forward direction. . .

 

If the jug has a speed of 2.6 m/s relative to the ground and the boy and skateboard move in the opposite direction at 0.58 m/s, find the boy’s mass.

Answer in units of kg

 

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ndnordic eNotes educator | Certified Educator

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This is an example of an inelastic collision where the two objects start together and then come apart.

general equation is:

(m1 + m2)v = m1v1 + m2v2

in this case, let the boy + skateboard be object 1 and the jug of water object 2.

initially everything is...

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