Homework Help: physics

Posted by Anton on Thursday, November 18, 2010 at 10:08am.

A 3.1 kg block has an initial velocity of 15 m/s as it moves 12m on a rough horizontal surface with coefficient of kinetic friction of .23.. ~ then slides up a frictionless incline whose angle is 24 degrees.
A (8 pts) Sketch energy pie charts at points a, band c. (Point c is the maximum height) Be sure to get changes correct. That is, if kinetic energy increases between two points, make that clear. But you won't be able to get the fractions of energy correct at this point.
B. (16 pts) Find how high the block goes up the hill. Be sur~ to, check your units explicitly and show the details of simplification.

physics - bobpursley, Thursday, November 18, 2010 at 10:09am
What is your question about this?
physics - Anton, Thursday, November 18, 2010 at 10:19am
How high does the block go up?
physics - bobpursley, Thursday, November 18, 2010 at 10:31am
initial KE-frictionwork=change in GPE
1/2 m*15^2-mu*mg*cosTheta*12=
=mgh where h is the vertical height it goes up vertically. the distance along the plane will be h/sinTheta

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