Advertisement Remove all ads

Give reasons for the following A teacher moving around in the class is doing work but a child standing and reading a book is not doing any work. - Physics

Explain

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

Advertisement Remove all ads

Solution

A child reading a book while standing is not moving from its place i.e. displacement is zero. Hence the product of force and displacement is zero
W=F × S
W = mg × O = O
Hence, the child is not doing any work. Where as teacher is moving from its place is doing work

Concept: Work
  Is there an error in this question or solution?
Advertisement Remove all ads

APPEARS IN

Selina Concise Physics Class 8 ICSE
Chapter 4 Energy
Short/Long Answer questions | Q 33.4 | Page 78
Advertisement Remove all ads
Advertisement Remove all ads
Share
Notifications

View all notifications


      Forgot password?
View in app×