A rod of length 2 m and mass 0.5 kg is fixed at one end and allowed to hang vertically from a rigid support. Find the work done in raising the other end of the rod until it makes an angle of 60^(@) with the vertical. (g=10 ms^(-2))

A rod of length 2 m and mass 0.5 kg is fixed at one end and allowed to

1.	A rod of length 2 m and mass 0.5 kg is fixed at one end and allowed to hang vertically from a rigid support. Find the work done in raising the other end of the rod until it makes an angle of 60^(@) with the vertical. (g=10 ms^(-2))
Answer» SOLUTION :`m=0.5 KG, l=2 m, theta = 60^(@)` Work done `W=mg.(l)/(2)(1-cos theta)` `= 0.5xx10xx(2)/(2)(1-cos 60^(@))-5xx(1-(1)/(2))=5xx(1)/(2)=2.5 J`