Work Energy Theorem

Question 1

Work done:

Answer 1

The product of displacement and the component of the force parallel to the displacement

Question 2

Gravitational potential energy

Answer 2

The energy an object possesses due to its position relative to a reference point .

Question 3

Kinetic energy

Answer 3

The energy an object possesses due to its motion

Question 4

Mechanical energy

Answer 4

The sum of an objects gravitational potential energy and its kinetic energy

Question 5

Law of conservation of energy

Answer 5

States that the total energy in a system cannot be created nor destroyed, only transferred from one form to another.

Question 6

Principal of conservation of mechanical energy

Answer 6

States that in the absence of air resistance or any external force, the mechanical energy of an object is constant

Question 7

Work- energy theorem

Answer 7

States that work done on an object by a net force is equal to the change in kinetic energy of an object

Question 8

Power:

Answer 8

The rate at which work is done

Or

The rate at which energy is transferred

Question 9

Watt

Answer 9

Is the power when one joule of work is done per second

Question 10

Efficiency

Answer 10

The ratio of output power to input power