A person carrying a bucket of water walks on a horizontal road with uniform velocity. What is work done by him if the road is smooth ?

A person carrying a bucket of water walks on a horizontal road with un

1.	A person carrying a bucket of water walks on a horizontal road with uniform velocity. What is work done by him if the road is smooth ?
Answer» Solution :Zero, because the FORCE required to hold the bucket and his DISPLACEMENT are perpendicular to each other.