Question

A uniform rod of length 4m and mass 20kg is lying horizontal on the ground. The work done in keeping it vertical with

one of its ends touching the ground, will be- plz answer with full steps​

Answer 1

Explanation:

a uniform rod of length 4 metres and mass 20 kg is flying horizontally on the ground the work done in keeping it vertical one of its and touching the ground will be-JEE Main paper will be multilingual and preference will be given to States with maximum number of applications

Answer 2

here shift in centre of gravity is l/2(refer attachment )

so apply l=4m

shift in centre of gravity =4/2=2m

w=mgh

w=m×g×l/2

=20×9.8×2

=392 J

hope this helps ☺