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julie julie
wrote...
12 years ago
Please explain so I can learn. Thanks!

A 40N crate is pulled up a 5m inclined plane at a constant velocity. If the plane is inclined at an angle of 37° to the horizontal and there is a constant force of friction of 10N between the crate and the surface, what is the net gain in potential energy by the crate?

A bobsled zips down an ice track starting at 150m vertical distance up the hill. Disregarding friction, what is the velocity of the bobsled at the bottom of the hill?
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wrote...
#1
12 years ago
For number 1, start by drawing a force diagram to get the directions in order, then start writing energy equations. don't forget to break everything down into parallel and perpendicular to the surface.

Number 2. Just use the long distance equation with respect to vertical only. If not, use your Velocity equation: Vfinal = Vinitial +at
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