A cart slides down an inclined 1.44m long inclined ramp. The height of the ramp is .10m. The angle of the ramp is not given.
The work done by the friction is -.06. I need to figure out the value of the friction force acting on the cart. The formula I'm using is Work done by the friction = Friction force * d cos theta.
My problem is that since the problem doesn't provide the angle, I'm not sure what to use for theta - should I use 180 degrees because the friction force is acting in the opposite direction? Or should I use 4 degrees (by deriving the unknown angle by using sin theta = height/length of ramp).
Thank you for your help.
2007-10-09 10:36:06 · 2 answers · asked by Eva 1 in Science & Mathematics ➔ Physics
Eva, you have the angle right in front of you. Your ramp is 1/10 of a meter high and the long length is 1.44 m long you have a base angle of 90; This means you have a 30 degree angle of incline.
2007-10-09 10:44:02 · answer #1 · answered by zipper 7 · 0⤊ 0⤋
It be a right triangle so the sin of theta is probably the way to go
2007-10-09 17:40:12 · answer #2 · answered by thule131 1 · 0⤊ 0⤋