What is the unit of work answer?
Joule
What is the unit of work done in SI unit?
joule
What is the formula for work?
To express this concept mathematically, the work W is equal to the force f times the distance d, or W = fd. If the force is being exerted at an angle θ to the displacement, the work done is W = fd cos θ.
What is unit of work and power?
The unit for standard metric work is the Joule and the standard metric unit for time is the second, so the standard metric unit for power is a Joule / second, defined as a Watt and abbreviated W.
What are the unit of power?
Watt
What is work and its types?
Work is a scalar quantity and is the product of two vector quantities. Depending on the value of q, there are three types of work: When q = 0°, work is said to be positive. Stretching of the spring is an example of positive work as the force is acting in the direction of displacement of the spring.
What are 3 types of work?
Explain the three types of work
- Positive work- when the force and the displacement are in the same direction(theta=0 degrees)
- Negative work- When the force and the displacement are in the opposite direction(theta=180 degrees)
- Zero work- When the applied force does not cause displacement(theta=90 degrees)
What are two types of work?
First, let’s take a look at the five kinds of work we do every day:
- Reactionary Work.
- Planning Work.
- Procedural Work.
- Insecurity Work.
- Problem-Solving Work.
How is work done?
Work is done when a force that is applied to an object moves that object. The work is calculated by multiplying the force by the amount of movement of an object (W = F * d). A force of 10 newtons, that moves an object 3 meters, does 30 n-m of work.
What is work done 10th?
Hint:Work is said to be done when an object moves in the direction of applied force. It is equal to the. product of the magnitude of displacement and magnitude of the component of the force in the. direction of displacement. Using the formula of work, find out the conditions at which work done.
What is work done equal to?
Work done on an object along a given direction of motion is equal to the force times the displacement times the cosine of the angle.
What is the force in work done?
When a force causes a body to move, work is being done on the object by the force. Work is the measure of energy transfer when a force (F) moves an object through a distance (d). So when work is done, energy has been transferred from one energy store to another, and so: energy transferred = work done.
What is the efficiency formula?
Efficiency is often measured as the ratio of useful output to total input, which can be expressed with the mathematical formula r=P/C, where P is the amount of useful output (“product”) produced per the amount C (“cost”) of resources consumed.
Is work done scalar?
Complete answer: Also, we know that work is a dot product of vectors force and the displacement. So, work is a scalar quantity, it has only magnitude not direction.
Can work done be 0?
Zero work is done when the displacement of a body is zero or perpendicular (θ=900,cosθ=0) to the direction of force applied, then work done is zero. Thus, the force applied and the displacement are in perpendicular directions. So, the work done is zero.
Can work done be negative Class 9?
When the direction of motion of the body and the force acting on the body is opposite, work done is negative. When the force is acting at a right angle to the direction of motion of the body, work done is zero.
What are the three types of work class 9?
Work and energy (Class 9 CBSE)
- Introduction.
- Work.
- Positive Work.
- Negative Work.
- Case of zero work done.
- Displacement at an angle to the force.
- Energy.
- Kinetic Energy.
What is meant by zero work?
Zero work is defined when force and displacement are perpendicular to one another and when force or displacement is zero. Example: The force acts in a downward direction, When displacement operates in the forward direction. If you push a wall, it doesn’t move there’s no work done.