Work, energy, power checkpoint

Energy is a measure of the ability to do _______

Efficiency depends on velocity

• True

• false

Efficiency can be calculated using either total energy transfers or power inputs and outputs

• true

• false

Power depends on speed

• True

• False

Which of these quantities has no unit

• Efficiency

• Power

• Work

• Kinetic energy

Which of these is not a unit of energy?

• Joules

• Newton metres

• kgm²s^-2

• kgms^-1

Work done is the same thing as energy transferred

• True

• False

Which of these is a unit of work?

• Nm

• Newtons per metre

• Joule-seconds

• Watts

Work done only depends on the component of force that is perpendicular to the displacement.

• True

• False