Question

When angle between force and displacement is obtuse,work done by the force is
a. Zero
b. positive
c. None
d. negative​

Answer 1

Answer:

Answer is D.

Work done can be positive,negative and zero. When a body is being lifted in the upward direction, the force of gravity is acting in the downward direction. But, the displacement of the body is in the upward direction. Since the angle between the force and displacement is 180 degrees, the work done by the gravitational force on the body is negative. Diagrammatic representation is given.Hence for negative work done, angle between force and displacement is 180

0

.

Answer 2

Answer:

negative

Explanation:

if angle between force and displacement is obtuse, then work done will be negative as negative work done take place when force and displacement are in opposite directions

hope it helps you very well