Recent content by richpetty888

Homework Statement A ball is thrown with initial velocity 20m/sec against a wall 50 meters away. It is released from a height of 1.8 meters, and hits the wall at 1.2 meters. Find the angle of the throw. Homework Equations 50=20t*cos(theta) -.6=20t*sin(theta)-.5(9.8)(t^2) The...

Thank you, sylas and willem! I understand it now.

Ok, I've got the force of gravity equaling m*(-g)*sin[theta]. Friction doesn't apply to that one, so no "u". Then, pushing force = u*mg*cos[theta]. Finally, force of the plane = P*(u*m). If I add them together (?) I get P(u*m)+(m*g)(ucos[theta]-sin[theta]) I seem to have the last part...

Homework Statement Person pushing a block with mass m on an inclined plane with angle [theta]. The friction coefficient is u. If the force applied is constant and parallel to the slope of the plane, show that the acceleration ax of the block in the direction of motion can be expressed as ...