WORK, ENERGY AND POWER

CONTENT

Meaning of Work, Energy and Power
Meaning of Potential and Kinetic Energy

Meaning of Work

Work is said to be done whenever a force or load moves through a distance. i.e. work = force × distance moved in the direction of the force (f × d).

Mathematically W(d) = f × d The unit of work is joules with symbol J.

Force

Force is that which changes a body’s state of rest or uniform motion in a straight line. It can as well be expressed as: Force = mass × acceleration i.e. F = m × a Where: F = force, M = mass and A = acceleration The unit of force is Newton (N). If force = mass × acceleration Work can be given as: Work = Mass × acceleration × distance. Also, W = F × S Where, W = Work done is measured in Joules (J)

You are viewing an excerpt of this lesson. Subscribing to the subject will give you access to the following:

NEW: Download the entire term's content in MS Word document format (1-year plan only)
The complete lesson note and evaluation questions for this topic
The complete lessons for the subject and class (First Term, Second Term & Third Term)
Media-rich, interactive and gamified content
End-of-lesson objective questions with detailed explanations to force mastery of content
Simulated termly preparatory examination questions
Discussion boards on all lessons and subjects
Guaranteed learning