Sage-Tips

What is the work done by the gravitational force FG on an object of mass m as the object moves upward through a displacement D?

The net force on the object is zero, Fa + Fg = 0. The displacement vector points in the upward direction. The work done by the gravitational force Fg, W = Fg·d = -Fgd = -mgd, is negative.

What is the amount of work done to move an object of unit mass from outside the field to any point inside the gravitational field?

“The gravitational potential, V, (Jkg^-1), at a point is the work done, W, per unit mass, m, to move a small object from a place far away from gravity fields”. It can also be defined as the energy required per unit mass to remove that mass from the gravity field (i.e. place it far away).

What is the work done by the gravitational force?

Answer. The work done by gravity is W=mgh.

What is the work done in bringing a body of mass m from infinity to the surface of earth of radius R and mass M?

-GMem/R, where Me is the mass of the earth and R is the radius of the earth.

What is the work done by the force of gravity on a satellite moving around the Earth?

zero
When a satellite moves around the Earth, then the force of gravity on the satellite is perpendicular to its displacement. Hence, the work done on the satellite by the Earth is zero.

What is a gravitational force that moves an object?

gravity, also called gravitation, in mechanics, the universal force of attraction acting between all matter. On Earth all bodies have a weight, or downward force of gravity, proportional to their mass, which Earth’s mass exerts on them. Gravity is measured by the acceleration that it gives to freely falling objects.

When an object in gravitational field moved then work is done by?

gravitational potential energy
When work is done energy is transferred to the object and it gains gravitational potential energy. If the object falls from that height, the same amount of work would have to be done by the force of gravity to bring it back to the Earth’s surface. 2000 J of work would have to be done to bring it back to the ground.

What is the work done by gravitational force on an object moving on a plane horizontal surface explain with reason?

Ans. Work done by the force of gravity on the object is zero. Force of gravity acts in the vertical downward direction and the distance covered the the tiobj of force, the horizontal direction. As there is no displacement in th hence the work done is zero.

Is work done by gravitational force positive?

Our work-energy theorem tells us that what matters in changing an object’s kinetic energy is the work — the component of force along the direction of motion. 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.

What is the work done in a bringing a body of mass m from infinity to the surface of the earth?

W = G Mm/R unit. This is amount of work done required to move the object with mass m from the surface of the earth to infinity. It indicates that work must be necessary to escape a body from the attractive gravitational field.

What is gravitational potential & potential energy of a body of mass m?

The gravitational potential energy of a body of mass ‘m’ at the earth surface is −mgRe​.

What is the work done by gravity over a given distance?

You have to think about what force is providing the work over a given distance. The gravitational force is an attractive force so that a heavy object will pull a lighter object towards itself (the heavier object). The work done on a point mass is done by a heavier gravitational force.

What is the formula for work done by the gravitational force?

We know, work done dW by the force F for infinitesimal displacement dr of the body is given by, Again, gravitational Force F acting over an object of mass m lying over the surface of the earth is given by, F = – G M m / r^2 along r, as it is always attractive.

What is the work of gravitational force at infinity?

Convention taken here is Gravitational PE at infinity to be zero, and nearer to the earth, gravitational PE is -x, we get above equation as, Work = − ( − x − 0) = x which is positive. I am confused. Please help me clearing my concepts.

What is the gravitational force between two objects measured in N?

According to Newton’s law of gravitation, every particle in the universe attracts every other particle with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between them. F is the Gravitational force between two objects measured in Newton (N).