A small block of mass m = 230 g is released from rest at point along the horizon
ID: 1902978 • Letter: A
Question
A small block of mass m = 230 g is released from rest at point along the horizontal diameter on the inside of a frictionless, hemispherical bowl of radius R = 29.5 cm as shown in the figure below.
(a) Calculate the gravitational potential energy of the block-Earth system when the block is at point relative to point . J
(b) Calculate the kinetic energy of the block at point . J
(c) Calculate its speed at point . m/s
(d) Calculate its kinetic energy when the block is at point . J
(e) Calculate the potential energy when the block is at point . J
Explanation / Answer
a) when at B: gravitational potential energy = -mgR = -0.665 J b) when at B: KE = 0.665J c) when at B : v=2.404m/s d) when at C: KE = 0.2218J e) when at C: potential energy = 0.4433 J