Recent content by jg727

Homework Statement A person of mass m is standing in an elevator of mass M. The elevator is moving downward, but has an upward acceleration of a. To an observer fixed on the Earth, the force exerted on the person by the floor of the elevator is a. (m+M)g b. m(g+a) c. m(g-a) d. M(a-g)...

A pendulum (with string length "L") and aball of mass "m" is pulled back to a horizontal position and then released. Assuming that θ is the angle between the string and the vertical, find (a.) the magnitude of the radial acceleration of this ball at an angle of θ as a function of m,g, L, and/or...

Thank You! Ok, so I guess I am actually having problems with finding the potential energy. I'm completely blanking.

A pendulum (with string length "L") and aball of mass "m" is pulled back to a horizontal position and then released. Assuming that θ is the angle between the string and the vertical, find the speed of the ball (v) at an angle of θ as a function of m,g,L, and/or θ. I just can't get my...