Question

Assertion : No work is done when a woman carrying a load on her head, walks on a level road with a uniform velocity. Reason : No work is done if force is perpendicular to the direction of displacement.

1 point

(a) Both assertion and reason are true and reason is the correct explanation of assertion

(b) Both assertion and reason are true but reason is not the correct explanation of assertion.

(c) Assertion is true but reason is false.

(d) Both Assertion and Reason are false​

Answer 1

it is d) both assertion and reason are false

Answer 2

Both assertion and reason are true but reason is not the correct explanation of assertion.

• Work is described by the product of force and the perpendicular displacement made by it.
• Since in this case the woman puts a force in the upward direction to balance the weight of the load walks on a level road, thus force and displacement are perpendicular to each other and work done will be zero according to physics.