To understand work in physics, we need to know how force and movement relate to each other.

What is Work?

• Work (W) is when you use a force (F) to move something a certain distance (d).
• The formula to calculate work is:
  $W = F \times d \cos(\theta)$
  Here, $\theta$ is the angle between the force and the direction you are moving.

Everyday Examples

1. Pushing a Box:

   • Imagine you push a box with a force of 10 N (Newtons) over a distance of 2 m (meters).
   • The work done is:
     $W = 10 \, \text{N} \times 2 \, \text{m} = 20 \, \text{J}$
     (Joules are a unit of work.)

2. Lifting an Object:

   • If you lift a 5 kg backpack up 1.5 m (meters) against gravity, you are also doing work.
   • To find that work:
     $W = F \times d = mg \times d = 5 \, \text{kg} \times 9.8 \, \text{m/s}^2 \times 1.5 \, \text{m} = 73.5 \, \text{J}$

Understanding work is important because it helps us see how energy is used in our everyday activities!