Work Energy Power

What is work?

• Product of force and displacement

• Product of energy and time

• Product of force and time

What is the SI unit for work?

• Degree celcius

• Kelvin

• Meter

• Joule

What are two physical quantities other than work which are measured in unit Joule (J) or Newton metre (Nm)?

• Moment of force

• Power

• Energy

Akram pushing a trolley over a distance of 5 m with a force of 10 N. What is work done by Akram?

• 500 J

• 50 J

• 5 J

Lisa pulling a drawer over a distance of 50 cm with a force of 2 N. What is work done by Lisa?

• 10 J

• 100 J

• 1 J

What is energy?

• Ability to do force

• Ability to do work

• Ability to do power

What is the S.I. Unit for energy?

• Newton

• Metre

• Joule

What is power?

• Ability to do work

• Rate of doing work

• Rate of doing force

• Ability to do force

What is formula for power?

• Power = work done / time taken

• Power = force / time taken

Layla pulled a box up a smooth ramp from A to B with a force of 30 N over a distance of 2 m in 5 s. What is the power used by Layla to pulled a box up?

• 12 W

• 24 W

• 300 W