Why is the work done by gravitational force zero?

No, because the angle between the gravity and the displacement is 90 degrees, we can now say gravity has no effect in this direction like we saw earlier. So gravity’s not causing this displacement at all, and therefore we can say the work done by gravity is zero, because gravity’s not the one that displaced this body.

Why is work done by gravity positive?

This gives us that the work done by the force of gravity is just mg times the change in height. This makes sense. If the object goes down (the height decreases so Δh is negative), the work done by gravity is positive so it tries to make the object’s KE increase.

Is the work done by the gravitational force?

It is possible to calculate the work done on a falling object by the gravitational force. If an object falls a certain distance, work will be done on it by the gravitational force that is acting on it. This work will cause the kinetic energy of the object to increase as it falls.

Why do we say that work done against gravity is negative?

Direction of force in a gravity is always towards the centre of earth. And the direction of displacement is against the force exerted by the gravity. So both the force and displacement is in opposite direction. So the work done is negative.

When an object is falling freely under gravity then what is the work done by gravitational force?

(i) When a body falls freely under gravity (θ = 0°), the work done by the force of gravity is positive.

When a body is lifted the work done by the gravitational force is?

When a body is lifted, the work done by the gravitational force is positive.

Does gravity do positive or negative work on a falling object?

When something falls due to gravity, gravity is doing positive work. To confirm, both the direction of acceleration and the direction of force are downward. Angle between them is zero.

Is gravitational work negative or positive?

Work done by gravitational force is negative.

When a body falls freely under gravity then work done by the gravity is?

JEE Question. If a force acting on a body has a component in the direction of displacement, then the work done by the force is positive. Hence when a body falls freely under the influence of gravity the work done by gravity is positive.