Answer to Question #128716 in Mechanics | Relativity for Ariyo Emmanuel

Question

A 1kg ball is connected to a rigid rod with negligible mass. If it is released from at the position shown, determine its speed when the rod becomes vertical. The spring is initially unstretched and has a spring constant k=4N/m.

Answer 1

Let rod be initially at horizontal position and length of rod is 1 meter.

Hence potential energy of the particle will change into kinetic energy.

$mgh = \frac{1}{2} mv^2$

Solving It,we get

$V =\sqrt{2gh} = 4.43 m/s$