Question

A teacher is moving around in the class is doing work but a child standing and reading a book is not doing work. Give reason

Answer 1

Answer:

W = F d cosФ

F = applied force

d = displacement

Explanation:

for teacher   d ≠ 0

while for student   d = 0

Answer 2

Explanation:

The teacher is moving all around the class. But the child is not changing his/her position. So, the teacher is doing work while the child is not doing any work