Question

A force of 75 N is exerted on a 45 kg sofa, and the sofa is
moved 5 m. How much work is done moving the sofa?

Answer 1

Given:-

• Force exerted on sofa (F) = 75N.

• Mass of sofa (m) = 45kg.

• Displacement (d) = 5m.

To Find:-

• Work is done moving the sofa (W).

Solution:-

The work done by a force acting on the object is equal to the product of force and displacement of the object in the direction of force.

⟹ Work done = Force × Displacement

⟹ W = Fd

Put the value which is given above we get,

⟹ W = 75×5

⟹ W = 375 Joule.

∴ The work is done moving the sofa is 375 J.

More Information!!!

✧ Product of mass and acceleration is called force.

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀OR

A push or pull of an object is called force.

✧ SI unit of Force is Newton.

✧ It is denoted by N.

✧ Force is vector Quantity i.e., both Magnitude and direction.

✧ SI unit of work done is Joule.

✧ Mathematical term

⟹ Force = Mass×Acceleration