Question

When is work said to be done? Give two examples tell fast​

Answer 1

Answer:

Kinematics is the branch of classical mechanics that describes the motion of points, objects and systems of groups of objects, without reference to the causes of motion (i.e., forces ). The study of kinematics is often referred to as the “geometry of motion.”

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Answer 2

Work is said to be done when a force applied to an object moves that object. We can calculate work by multiplying the force by the movement of the object.

Work is done whenever the given conditions are satisfied:

• A force acts on the body.
• There is a displacement of the body caused by the applied force along the direction of the applied force.

Example:

• When a body moves on the horizontal surface, force and displacement act in the forward path. The work is done in this case known as Positive work.
• Kicking a football.
• Moving a chair.
• Throwing a stone.
• Riding a bicycle.
• Doctors moving a patient in wheel chair.
• striking a pen into another pen.
• Riding a skateboard.
• Pushing and moving a table.

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