4cWork and power

Syllabus objectives

• 4.11know and use the relationship between work done, force and distance moved in the direction of the force: work done = force × distance moved W = F × d
• 4.12know that work done is equal to energy transferred
• 4.13know and use the relationship between gravitational potential energy, mass, gravitational field strength and height: gravitational potential energy = mass × gravitational field strength × height GPE = m × g × h
• 4.14know and use the relationship: kinetic energy = 21 × mass × speed2 2 1 vmKE ××=
• 4.15understand how conservation of energy produces a link between gravitational potential energy, kinetic energy and work
• 4.16describe power as the rate of transfer of energy or the rate of doing work
• 4.17use the relationship between power, work done (energy transferred) and time taken: work donepower time taken= t WP =