Question

A $2\,kg$ mass lying on a table is displaced in the horizontal direction through $50\,cm$. The work done by the normal reaction will be

• A. 10 J
• B. 0
• C. 100 erg
• D. 100 J

Answer 1

Answer: (B)

0

Answer 2

Normal reaction on the-mass by the table is perpendicular to the horizontal displacement. Hence work done by normal reaction will be zero.