Question

A 190 g particle is released from rest at point A inside a smooth hemispherical bowl of radius 25.0 cm.

Calculate the gravitational potential energy at A

also, how do you find kinetic energy if you aren't given velocity?

please help me! i would really appreciate it

Answer 1

The potential energy depends upon the height h above the bottom of the hemisphere. You have not said where point A is, so I cannot tell you the value of potential energy.
Its value is P.E. = M g h.

If you know the angle from the vertical at point A, measured from the center of curvature of the bowl, then
h = R(1 - cos A)

As it slides down the bowl, it gains kinetic energy (K.E.) equal to the decrease in P.E.