Friday
March 6, 2015

Homework Help: Physics

Posted by Priscilla on Tuesday, February 2, 2010 at 9:23pm.

I really need help with only this two problems.

1. A 6.0 kh block, sliding to the east across a horizontal, frictionless surface with a momentum of 30 kg*m/s^, strikes an obstacle. The obstacle exerts an impluse of 10 N*s to the west on the book. The speed of the block after the collision is...

2. While riding a chairlift, a 55 kg skier is raised a vertical distance of 370 m. what is the total change in the skier's gravitional potential energy? given: m = 55 kg d = 370 m When i used PE = mgh, the answer was 199,430, i know its wrong since the answer is something else. But what equation can i use?

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