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When a book falls from a shelf to the ground without anyone pushing it Is work is being done on the book?
Wiki User
∙ 13y ago
Work is being done by the force of gravity.
When the book falls to the floor, there's a force on it, and the force keeps acting on it as it covers the distance. A force acting through a distance is the definition of work. Maybe there's nobody pushing the book, but the force of gravity is pulling it down, and it's the force of gravity that does the work on the book.
Wiki User
∙ 13y ago
No work is being done on the book when it falls from the shelf to the ground. Work is defined as the transfer of energy from one object to another due to a force acting on the object in the direction of its motion. In this case, gravity is the force acting on the book, causing it to fall, but there is no transfer of energy to another object.
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How friction is useful in pushing a car?
If you are behind a car, about to push it forward from a resting position, you will need to exert a force on the car to accelerate it from resting position. While you are pushing against the car, however, there will be a reaction force pushing back at you. In order to produce a large net force against the car without being pushed backward yourself, you need to increase the friction of your feet against the ground...so that the frictional force between your feet and the ground prevents you from sliding backward. The combinations of the frictional force and your force pushing forward against the car will cause the car to move forward. The frictional force of the car being moved from resting position also has to be overcome, of course.
What force is being caused when pushing?
When pushing an object, the force being applied is a contact force called mechanical force. This force is generated by the interaction between the pushing object and the object being pushed. It causes the object to accelerate in the direction of the push.
Give four examples of a force being exerted?
Five different examples of pushing forces: 1. Pushing a box across the room 2. Sliding a drink down a bar 3. "Pushing" the computer mouse across the mousepad 4. A center pushing a defensive lineman down the field 5. Pushing a car that is in neutral
Diferentiate between pushing and pulling forces?
Pushing forces are forces that result from an object being moved away from you, while pulling forces are forces that result from an object being moved towards you. In pushing, the force is exerted in the direction opposite to the motion, while in pulling, the force is exerted in the direction of the motion.
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pushing a pram kicking a ball pushing the door pushing the car
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How friction is useful in pushing a car?
If you are behind a car, about to push it forward from a resting position, you will need to exert a force on the car to accelerate it from resting position. While you are pushing against the car, however, there will be a reaction force pushing back at you. In order to produce a large net force against the car without being pushed backward yourself, you need to increase the friction of your feet against the ground...so that the frictional force between your feet and the ground prevents you from sliding backward. The combinations of the frictional force and your force pushing forward against the car will cause the car to move forward. The frictional force of the car being moved from resting position also has to be overcome, of course.
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shouldn't y'all have he answers up here all ready dis is answer . com rite so stopp being dumb and get to workin yhu piece of crap
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What is a examples of a pushing force?
pushing a pram kicking a ball pushing the door pushing the car
