Physics, 24.03.2020 02:24, roseemariehunter12
A 0.140 kg stone rests on a frictionless, horizontal surface. A bullet of mass 8.50 g , traveling horizontally at 320 m/s , strikes the stone and rebounds horizontally at right angles to its original direction with a speed of 250 m/s.
(a) Compute the magnitude and direction of the velocity of the stone after it is struck.
(b) Is the collision perfectly elastic?
Answers: 1
(Positive), b) 
. The collision is not perfectly elastic.
![e = \frac{\frac{1}{2}\cdot [(0.140\,kg)\cdot (34.607\,\frac{m}{s} )^{2}+(0.0085\,kg)\cdot (-250\,\frac{m}{s} )^{2}] }{\frac{1}{2}\cdot [(0.140\,kg)\cdot (0\,\frac{m}{s} )^{2}+(0.0085\,kg)\cdot (320\,\frac{m}{s} )^{2}] }](/tpl/images/0560/2813/e95d2.png)
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A 0.140 kg stone rests on a frictionless, horizontal surface. A bullet of mass 8.50 g , traveling ho...
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