posted by Eliana .
Wildlife biologists fire 22g rubber bullets to stop a rhinoceros charging at 0.84 m/s. The bullets strike the rhino and drop vertically to the ground. The biologists' gun fires 15 bullets each second, at 72 m/s, and it takes 36 s to stop the rhino. What impulse does each bullet deliver? as well as What's the rhino's mass? Neglect forces between rhino and ground.
impulse = change in momentum = .022*72 for each bullet
total change in bullet momentum + total change in rhino momentum = 0
number of bullets*.022*72 = m * .84
For part b, divide the speed of the rhino by the time it takes to stop it which would give you the acceleration.