What is meant by variable force?
What is meant by variable force?
[′ver·ē·ə·bəl ′fȯrs] (mechanics) A force whose direction or magnitude or both change with time.
How will you determine the work done by a 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 variable force example?
Suppose the force is variable: we might be looking at the displacement of a spring over a distance d, the sending of a rocket into space, or the winding of a cable onto a drum. The force exerted by a spring is directly proportional to its displace- ment x from its natural length.
What is the formula of variable force?
Fs = -kx. Thus, Ws = Fs x vdt. Integration and Formula for Variable Force Work.
What is the formula of work done?
Mathematically, the concept of work done W equals the force f times the distance (d), that is W = f. d and if the force is exerted at an angle θ to the displacement, then work done is calculated as W = f . d cos θ.
Which best describe a variable?
Which of the following statements best describes a variable? It is a function that can be run recursively. It stores a value that can be changed. It is a reserved word in a programming language.
Which term best describes a variable that is affected by other variable?
A variable that measures the effect that manipulating another variable has is known as: A dependent variable.
What is work done unit?
One joule is defined as the amount of work done when a force of one newton is exerted through a distance of one meter. 1 joule of work = 1 N of force x 1 m of distance. In the English system of units, where force is measured in pounds, work is measured in a unit called the foot-pound (usually abbreviated ft-lb).
How is work done by force measured?
When the force F {\\displaystyle F} is constant and the angle between the force and the displacement s {\\displaystyle s} is θ, then the work done is given by W = Fs cos θ. Work transfers energy from one place to another, or one form to another. The SI unit of work is the joule (J).
What is the work done against a force?
Work done by a body is against the applied force if the displacement is in a direction opposite to the force. In the case of gravity, if a body is lifted above the ground, work is done against gravity.
What is work done by a force F?
In physics, work is said to be done by a force or against the direction of the force , when the point of application of the force moves towards or against the direction of the force. If no displacement takes place, no work is said to be done. The terms work and energy are quite familiar to us and we use them in various contexts.
Can work be done by friction?
Friction can convert the work done into heat energy and many more forms. For example, a fire that is ignited by rubbing two pieces of stone together and this happens due to friction. Since the very beginning of human civilization, humans have tried to fight against friction and new tools were invented to serve the purpose.