A 2kg mass lying on a table is displaced in the horizontal direction through 50cm.The work done by Normal reaction will be?
Answers
Answer: 0
Explanation:
Normal reaction on the-mass by the table is perpendicular to the horizontal displacement. Hence work done by normal reaction will be zero.
ANSWER:
The work done by the normal reaction will be zero.
EXPLANATION:
A "2 kg mass lying" on a "table is displaced" in the "horizontal direction" through a distance of 50 cm. So the work done on the mass is in horizontal direction as the mass got displaced horizontally to 50 cm on the table. The mass did not exhibit any vertical component of force on it, only horizontal component is acting on it and the displacement is also occurring only in horizontal direction with no vertical displacement.
The normal reaction to the work done on the mass for the horizontal displacement will be the vertical components of force exerted on the mass and the vertical displacements of the mass. As there is no displacement in vertical direction as well as no vertical component of force acting on the mass to initiate the horizontal displacement, the work done on the mass by normal reaction to horizontal displacement will be zero.