How much work you do on an object as you lift it to a height h from the ground?

So if an object of mass m is raised through a height h, the work done on the object is equal to mgh, and so this amount of energy is transferred to the object. (Notice that this equation is identical to the one describing an object falling under gravity, Equation 7.)

What is the amount of force required to lift an object against the force of gravity?

What is the amount of force required to lift an object against the force of gravity equal to? – Quora. Standard answer … based on Newton’s 2nd Law, F = ma, to move an object upwards at a steady speed (ie. a = 0) you only need to apply an upward force equal to the weight of the object.

How does gravity do work?

Gravity does work whenever an object moves in the direction of the gravitational force. The work done by gravity depends only on the total displacement in the direction of the gravitational force. The work done by gravity corresponds to potential energy being converted into kinetic energy or vice versa.

What happens when against gravity?

A lack of gravity would eventually take its toll on our very planet, writes Masters. “Earth itself would most likely break apart into chunks and float off into space.” Without the force of gravity to hold it together, the intense pressures at its core would cause it to burst open in a titanic explosion.

How the work is done in a lifting body?

When you are lifting a body you apply force upwards, while the acceleration due to gravity is downwards. So if you choose direction of motion of body to be positive then acceleration due to gravity is negative . Work done in lifting a body is negative of the change in potential energy of the body.

How much work is done in lifting a body?

The force you are exerting is equal in magnitude and opposite in direction to the force of gravity. As you are lifting the object you are doing work on the object. The work W done on an object by a constant force is defined as W = F·d.

What is the minimum force required to lift an object?

g=9.8N/kg or 9.8m/s^2. Textbook says potential energy is mgh. why? According to textbook, PE=mgh because minimum force required to lift the object is mg and height is h.

How much force is needed to lift the 10Kg weight?

How much force is needed to lift the 10Kg weight? The correct answer is (B) 5 Kg. In a double-pulley system, the force is equal to the weight divided by two. It will require a 5 Kg force to lift a 10Kg weight.

Where is gravity strongest on earth?

In the case of the earth, the force of gravity is greatest on its surface and gradually decreases as you move away from its centre (as a square of the distance between the object and the center of the Earth). Of course, the earth is not a uniform sphere so the gravitational field around it is not uniform.

What would happen if gravity stopped for 1 second?

When gravity disappears for 1 second the outwards force balanced by the gravity would be released causing a massive explosion. In other star systems with more immense stars and natural phenomena such as pulsars and and especially black holes the explosions and expansions would be greater.

Is lifting a weight negative work?

Is lifting positive or negative work?

Work is positive when the component of the force is the same direction as the displacement. For example, when you lift a box, the work done by the force you exert on the box is positive because the force is upward, in the same direction as the displacement.

Is work done when you lift a brick?

Is work done when you lift a brick? Yes, the force applied is parallel to the direction of motion.

When a person lifts a body from the ground work done by lifting force is?

When a person lifts a body from the ground, the two vectors are parallel to each other. So, yes work is indeed being done.

What force is required to lift a book of mass?

The force required to lift a book of mass \(m\) will be equal to the weight of the book given as, \(F=mg\). The force exerted to lift a book is required to overcome the downwards gravitational force acting on the book due to the mass of earth.

Which type of force you have used to lift the table?

If an object is resting on a table then it will have a reaction force (the normal force) also acting upwards on the object.

How long will it take a 2.5 KW motor to lift a 80 kg block 30 m high?

Motor will take 9.4 s to lift block. Work done by motor to lift block is equal to change in gravitational potential energy of block.

How much force is required to lift 75 kg?

250 N
A force of 250 N is required to lift a 75 kg mass through a pulley system.