Homework Help: PHYSICSS

Posted by ashley on Sunday, October 3, 2010 at 4:51pm.

A block is projected up a frictionless inclined plane with initial speed v1 = 3.40 m/s. The angle of incline is è = 31.1°.
(a) How far up the plane does it go?(m)
(b) How long does it take to get there? (s)
(c) What is its speed when it gets back to the bottom?(m/s)

PHYSICSS - bobpursley, Sunday, October 3, 2010 at 5:07pm
its KE will equal the change in PE

1/2 m 3.4^2=mg*d/sin31.1
solve for d

How long? its average velocity is 3.4/2, the distance above, so t=distance/avgvelocity

when it returns to bottom, same speed as started, opposite direction.

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