Question

3) Give reason:
a) Efficiency of a lever is always less than hundred percent.​

Answer 1

$\huge \mid \colorbox{aqua}{Answer} \mid$

The output work is always less than the input work because some of the input work is used to overcome friction. Therefore, efficiency is always less than 100 percent.Some of the force applied to moving the furniture must be used to overcome the friction with the ramp.

HOPE OT IT WILL HELP

Answer 2

the the output work is always less than the input work because some of the input work is used to overcome friction.

Hope it will help you.......

please mark me as brainliest.....