Hey there! Ready to explore how things move and get done in our universe? Let's take a look at the awesome relationship between energy and work!
In physics, 'work' isn't just homework or chores. It has a very specific meaning: work is done whenever a force moves an object over a distance.
To do work, we must apply a force (like a push or a pull) in the same direction that the object is moving. If the object doesn't move, no work is done!
Energy is the ability or capacity to do work. When you do work on an object, you transfer energy to it, changing either its speed or its position.
✏️ Worked example
A student pushes a heavy box with a constant force of 20 Newtons across a flat floor for a distance of 5 meters. How much work did the student perform on the box?
Identify the given values: Force (F) = 20 N, and Distance (d) = 5 m.
Recall the formula for work: Work = Force × Distance (W = F × d).
Substitute the values into the formula: W = 20 N × 5 m.
Calculate the final value: W = 100 Joules (J).
State the final answer clearly: The student did 100 Joules of work on the box.
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