Which of the following has the greatest momentum? car with a mass of 1540 kg mov

Question

Which of the following has the greatest momentum? car with a mass of 1540 kg moving at a velocity of 38 m/s car with a mass of 1210 kg moving at a velocity of 51 m/s truck with a mass of 6120 kg moving at a velocity of 10 m/s truck with a mass of 2250 kg moving at a velocity of 25 m/s A child with a mass of 23 kg rides a bike with a mass of 5.5 kg at a velocity of 4.5 m/s to the south. Compare the momentum of the child with the momentum of the bike. The bike has a greater momentum than the child. Neither the child nor the bike has momentum. The child has a greater momentum than the bike. Both the child and the bike have the same momentum. A roller coaster climbs up a hill at 4 m/s and then zips down the hill at 30 m/s. The momentum of the roller coaster is greater down the hill than up the hill. is zero throughout the ride. is greater up the hill than down the hill. remains the same throughout the ride. An ice skater initially skating at a velocity of 3 m/s spee

Explanation / Answer

1.

a.   momentum = mass x velocity = 1540 x 38 = 58520 kgm/s

b. momentum = mass x velocity = 1210 x 51 = 61710 kgm/s

c. momentum = mass x velocity = 6120 x 10 = 61200 kgm/s

d. momentum = mass x velocity = 2250 x 25 = 56250 kgm/s

so greatest is b)

2.

momentum of child = mass of child x velocity = 23 x 4.5 = 103.5

momentum of bike = mass of bike x velocity = 5.5 x 4.5 = 24.75

c . child has greater momentum

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