(10%) Problem 5: A young 38-kg ice hockey goalie, originally at rest, catches a
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(10%) Problem 5: A young 38-kg ice hockey goalie, originally at rest, catches a 0.13-kg hockey puck slapped at him at a speed of 37 m/s. In this problem, take the original direction of the puck as positive > 50% Part (a) Suppose the goalie and the ice puck have an elastic collision and the puck is reflected back in the direction from which it came. What would the final velocity of the puck, in meters per second, be in this case? Grade Summa Deductions Potential ry 090 100% cos0 atan acotan sinhO Degrees O Radians tan() | acosO Sin Submissions Attempts remaining:J5 (5% per attempt) detailed view cotanasin0 cotanhO END Submit Hint I give up! Hints: 5% deduction per hint. Hints remaining: Feedback: 590 deduction per feedback. - 50% Part (b) Suppose the goalie and the ice puck have an elastic collision and the puck is reflected back in the direction from which it came What would the final velocity in meters per second ofthe goalie be in this case?Explanation / Answer
As the collision is elastic so momentum wil be conserved if ice puck has initial momentum =0.13×37=4.81kgm/s because collisin between puck and goalie is elastic e puck has final momentum =-0.13×37=4.81kgm/s so final velocity of puck wil be -37 m/s
Acc to,law of consevation of energy
Mgug+Mpup= Mgvg+Mpvp
0.13×37=Mgvg-0.13×37
Mgvg= 2×0.13×37
vg= 2×0.13×37/38=0.253m/s
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