If a variable force is acted on a body, the motion of the body is non-uniformly accelerated. If the force acted on a body is not varied with time (i.e., the same amount of force) then the force is said to be Constant force. If a Constant force is acted on a body, the motion of the body is uniformly accelerated.
What is work done in physics?
work, in physics, measure of energy transfer that occurs when an object is moved over a distance by an external force at least part of which is applied in the direction of the displacement. If the force is being exerted at an angle θ to the displacement, the work done is W = fd cos θ.
How do you find the variable force?
Work done by a variable force
- The variable force is more commonly encountered than the constant force.
- If the displacement Dx is small, we can take the force F (x) as approximately constant and the work done is then. DW =F (x) Dx.
What is half KX Square?
The work done on the system equals the area under the graph or the area of the triangle, which is half its base multiplied by its height, or W=12kx2 W = 1 2 kx 2 .
What is strain formula?
The strain formula is: S = \frac{\Delta x}{X} Here, S = strain (it is unitless) \Delta x = change in dimension. X = original dimension.
Is spring force a variable force?
A spring force is a variable force because it is a function of x (the position of the free end).
What is work done in 9th physics?
Work done on an object is defined as the magnitude of the force multiplied by the distance moved by the object in the direction of the applied force.
What is work Physics example?
The SI unit of work is Joule (J). For example, if a force of 5 newtons is applied to an object and moves 2 meters, the work done will be 10 newton-meter or 10 Joule.
How do you calculate the work done by a variable force?
In the case of a variable force, integration is necessary to calculate the work done. The work done by a constant force of magnitude F, as we know, that displaces an object by Δx can be given asL: W = F.Δx. In the case of a variable force, work is calculated with the help of integration.
What is the work done by a force?
A force is said to do work when it acts on a body so that there is a displacement of the point of application in the direction of the force. Thus, a force does work when it results in movement. In the case of a variable force, integration is necessary to calculate the work done. For example, let’s consider work done by a spring.
What is the work done if the object does not move?
No work is done if the object does not move. A force is said to do work when it acts on a body so that there is a displacement of the point of application in the direction of the force. Thus, a force does work when it results in movement.
Are the forces we encounter everyday mostly variable in nature?
It is interesting to know that the forces we encounter everyday are mostly variable in nature which is defined as a variable force and we rarely encounter a constant force. A force is said to perform work on a system if there is displacement in the system upon application of the force in the direction of the force.
