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Work, in physics, is defined as the dot product of a Force times displacement. The dot product just means that Work is not a vector quantity.
Vectors have magnitude and direction. Work has only magnitude, like energy, and no defined direction. In physics, quantities with no direction are called scalar quantities.
Here is the equation for Work:
w = F * d
or, work equals Force dot (times) Displacement.
If I push hard on a large building with all the Force I can muster, let us say 100 pounds of force, and if the building refuses to move (the building has not been displaced), then the work done is zero.
We can see from the equation above, and the example, that if the object we apply a force to does not move, then it is just some quantity times zero.
So despite how hard one has tried to move an object with all the force that can be mustered, if the object does not move as a result, no work has been done. It does not matter how tired I am from pushing hard.
Physically speaking, no work got done.
Wiki User
∙ 13y ago
Wiki User
∙ 12y agoWork is define by : W = ⌠F∙dS
where F is the force that does the work.
dS is the displacement differential of a border by force F.
F and S are vectors and F∙dS is a scalar product of both vectors.
With zero force you get zero work.
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Is it possible workdone is zero although body is moving?
Yes, if no force is applied. Work = force x distance, so if the force is zero, no work is done.Yes, if no force is applied. Work = force x distance, so if the force is zero, no work is done.Yes, if no force is applied. Work = force x distance, so if the force is zero, no work is done.Yes, if no force is applied. Work = force x distance, so if the force is zero, no work is done.
When is workdone by force is zero?
work done on an object zero by a force would be zero isif the displacement of the object is zero
Why work done by centripetal force during half rotation is zero?
work done is zero because force is toward the centre and distance is tangent to the circle so cos90 is equal to zero.[abbasia]
Why is no work being done on books on shelf physics?
Work = force x distance. With a distance of zero, the work will also be zero.
What should be the angle between the direction of force and the direction of motion of a body so that the work done is zero?
If the force is perpendicular (at 90 degrees) to the direction of motion, that force does no work.
What is work done if there is nodisplacement is 0?
Work Done = Force x Displacement, so if the displacement is zero, the work done will be zero. There will be no work done.
Is it possible workdone is zero although body is moving?
Yes, if no force is applied. Work = force x distance, so if the force is zero, no work is done.Yes, if no force is applied. Work = force x distance, so if the force is zero, no work is done.Yes, if no force is applied. Work = force x distance, so if the force is zero, no work is done.Yes, if no force is applied. Work = force x distance, so if the force is zero, no work is done.
When is workdone by force is zero?
work done on an object zero by a force would be zero isif the displacement of the object is zero
Why work done by centripetal force during half rotation is zero?
work done is zero because force is toward the centre and distance is tangent to the circle so cos90 is equal to zero.[abbasia]
What is the difference between negative work and zero work and positive work done?
If the angle between the displacement and force applied is less than a right angle, then it is Positive Work done. If the angle between the displacement and the force applied is greater than a right angle then it is Negative Work done. If the displacement and force are at right angles, or either is zero, then it is Zero Work done.
When you ignite a matchstick then work will be done or not?
no work will be done because force is applied but displacement is zero so no work will be done.
Is Work done by centripetal force is zero?
An object moves in a circle at constant speed. The work done by the centripetal force is zero because: 1. the displacement for each revolution is zero 2. the average force for each revolution is zero 3. there is no friction 4. the magnitude of the acceleration is zero 5. the centripetal force is perpendicular to the velocity
Why does work done by centripetal force is zero?
An object moves in a circle at constant speed. The work done by the centripetal force is zero because: 1. the displacement for each revolution is zero 2. the average force for each revolution is zero 3. there is no friction 4. the magnitude of the acceleration is zero 5. the centripetal force is perpendicular to the velocity
Why is no work being done on books on shelf physics?
Work = force x distance. With a distance of zero, the work will also be zero.
I lift a suitcase with a force of 60 newtons of 0.5 meters. How do you know whether work was done?
Work is defined as (force) times (distance). If the force is not zero, and the distance it moved through is not zero, then work was done. In other words, if you applied a force, and kept it going while the place you applied the force moved, then work was done. In this case, work = (60) x (0.5) = 30 newton-meters = 30 joules of work.
How much work is done when a vertical force acts on an object moving horizontally?
as work done is dot product of force and displacement so cos(90)=0;therfore work done is zero
What force allows work to be done?
Any force can produce work if it causes displacement. If displacement is in opposite direction of force, work done will be negative and if displacement is in direction of force work done will be positive. If there is no displacement, work done is zero. Eg: Gravitational force pulls you down towards earth, in pulling you down it does work on you which gets stored in form of potential energy. Energy for A+
