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Force and laws of motion

Asked by docben 24th September 2009, 12:50 PM
Answered by Expert
Answer:

Change in linear momentum = Pfinal - Pinitial

= mvfinal - mvinitial

= m (vfinal - vinitial) = 0.2 kg(-5m/s - 10m/s) = - 3 kgm/s

Note that 10 m/s, the initial velocity is taken as positive, because we assume that direction as positive, but when the hockey ball returns the direction is changed and is opposite so the final velocity is -5 m/s.

 

Regards,

Team,

TopperLearning.

 

 

Answered by Expert 25th September 2009, 9:21 PM
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