Question

give two examples of everyday situations where work is being done and two examples of situations where work is not done​

Answer 1

Answer:

Work done = force * displacement. 2 conditions that must be met for the work to be done: a. the force should act on the body.

b. the body must displace in the direction of force. 2 examples where work is being done: a. picking up the bag.

b. dragging a toy car. 2 examples where work is not done: a. pushing a wall.

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Answer 2

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• Work is said to be done when a Force F acts on an object and object moves through a distance S in the direction of force.
• Work done can be positive , negative or Zero.
• Work is done whenever a force moves something.
• Whenever work is done, energy is transferred from one place to another.
• Work is done whenever a force or a component of a force results in a displacement.
• No component of the force is acting in the direction of motion when the book is moved horizontally with a constant velocity.
• The force and the displacement are independent.

Everyday examples of work include :-

• walking up stairs
• lifting heavy objects
• pulling a sledge
• pushing a shopping trolley
• moving table
• pushing and pulling of door
• walking
• playing
• lifting a rock if it moves from its place

Everyday examples where no work is included :-

• No work is done by the hand on the book.
• If a block is moving on a smooth horizontal surface, no work is done.
• When you sit on the chair, no work is done.
• While standing at a place, no work is done.

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