Question

a body of certain mass is lifted upward from the ground to a certain height the work done by the gravitational force and applied force respectively are
a positive, negative
b negative, positive
c positive, positive
d negative, negative​

Answer 1

Answer:

a positive, negative

Explanation:

this is the right answer

Answer 2

(a) Positive, Negative is the correct option

Explanation:

• When a body is raised, the gravitational force performs negative work. The weight is pulled up by the gravitational force acting downwards.
• When brakes are applied to a moving vehicle, the braking force performs negative work. While the vehicle's displacement is in the forward direction, the braking force works in the reverse direction.
• Hence a body of certain mass is lifted upward from the ground to a certain height the work done by the gravitational force and applied force respectively are positive and negative