What do you mean by work done by a body?
Work done on a body is equal to the increase in the energy of the body, for work transfers energy to the body. If, however, the applied force is opposite to the motion of the object, the work is considered to be negative, implying that energy is taken from the object.
What is a unit of work in physics?
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).
What are the types of work in physics?
Types of Work in Physics
- Positive Work. If the angle formed between the force and the displacement is less than 900, then the work done will be positive ie 0≤θ<900.
- Negative Work.
- Zero Work.
What are the three components of work physics?
In summary, work is done when a force acts upon an object to cause a displacement. Three quantities must be known in order to calculate the amount of work. Those three quantities are force, displacement and the angle between the force and the displacement.
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. 1 Joule = 1 Newton × 1 metre.
What is work in physics class 11?
In Physics, work is defined as the product of force and displacement. If an object is acted upon by a force, work done is nothing but the product of the magnitude of this force and the displacement of the object caused by the 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.
What are 3 types of work?
Answer
- 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 the characteristics of work physics?
Lesson Summary But in physics, work is only one thing: the displacement of an object due to force. Anytime work is done there are three components involved: the amount of force (in Newtons), the distance of the displacement (in meters), and the cause of the displacement (the force).
What are the characteristics of work?
Widely accepted and recognized task characteristics are: work autonomy, task variety, task significance, task identity, and feedback.
How is work defined in science class 9?
Class IX Science Work Done. • 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. Work done = force × distance.
What is work class 9 short answer?
• 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. Work done = force × distance. = F × s.
How is work done in physics defined?
For a work to be done, in a scientific sense, a force must be exerted and there must be displacement in the direction of the force. With this said, we can say that Work is the product of the component of the force in the direction of the displacement and the magnitude of this displacement.
What is work?
What is Work? Work is said to be done when a body or object moves with the application of external force. We can define work as an activity involving a movement and force in the direction of the force. For example, a force of 30 newtons (N) pushing an object 3 meters in the same direction of the force will do 90 joules (J) of work.
What is the work done by the force?
With this said, we can say that Work is the product of the component of the force in the direction of the displacement and the magnitude of this displacement. W is the work done by the force.
What is the dimension of work in physics?
The dimension of work is the same as that of energy and is given as, [ML2T–2]. The SI unit of work is the joule (J), which is defined as the work done by a force of 1 Newton in moving an object through a distance of 1 meter in the direction of the force. A weightlifter lifts a barbell weighing 25 kg and displaces it from the ground by 2 m.