Question

water balloon launcher with a mass of 1.75 kg is suspended on a wire it fires a 1.25 kg balloon to the east and the velocity of 12.0 meter per second what is the resulting velocity of the launcher if the net force on the launcher is equal to the reaction force

Answer 1

Answer:

Explanation:

Use conservation of momentum.

Assume positive direction to east, negative to west

At start, m = 1.75 + 1.25 = 3 kg, v = 0. momentum = mv = 0

At finish, if v is velocity of launcher 1.25 x 12 + 1.75 v = 0 (total momentum must be zero)

giving v = - 8.57 m/s (in other words 8.57 m/s to the west)