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If a child pulls an old wagon up a steep incline, on a sidewalk, what does a child's work do?

Question:

If a child pulls an old wagon up a steep incline, on a sidewalk, what does a child's work do?

Work:

The work is a form of energy. If work is done on an object by applying an external force, then the energy of the object increases.

The work, done against the force of gravity is stored in the object as its gravitational potential energy.

The gravitational potential energy is given as, {eq}G.P.E = m\ g\ h {/eq}

Answer and Explanation:

When a wagon is pulled up an incline, then some work is done on it by the external force.

This work is done against the force of gravity.

The vertical height of the wagon increases.

Thus gravitational potential energy of the object increases.

We can say that the total mechanical energy of the wagon increases.

Thus child's work will increase the wagon's total mechanical energy.


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What is Energy Conservation? - Definition, Process & Examples

from ICSE Environmental Science: Study Guide & Syllabus

Chapter 1 / Lesson 6
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