Homework Help: physics!

Posted by Eliana on Friday, March 23, 2012 at 4:30am.

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.

physics! - Damon, Friday, March 23, 2012 at 5:23am
impulse = change in momentum = .022*72 for each bullet

total change in bullet momentum + total change in rhino momentum = 0
so
number of bullets*.022*72 = m * .84

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