StJ AQA Physics: Energy and Work. Lesson 6

A force of 20N is applied to a sleeping cat to slide it 2m across a sofa.
What is the work done?


HINT: Work done (J) = Force (N) x distance (m)

• 20J

• 40J

• 2J

• 400J

A force of 60Nm is used to stop a bike. What is the energy transferred?

HINT: 1Nm = 1J

• 30J

• 1J

• 60J

• 120J

A policewoman, weighing 580N pulls herself 4m up a rope. What is the work done?

HINT: Work done (J) = Force (N) x distance (m)

• 2320J

• 145J

• 0.007J

• 584J

100J of energy is transferred when a boy pushes his toy car along the floor. He pushes with 25N of force.

How many metres along the floor does he push the toy car?

HINT: Rearrange the equation:

Work done (J) = Force (N) x distance (m)

• 0.25m

• 2,500m

• 4m

• 125m

The unit for Work done is

• Julien

• Newton

• Watt

• Joules

A force exerted over a distance to move an object is...

• Power

• Work

• Momentum

• Watt

In which of these cases is work being done?

• A student sleeps

• A student carries his chair into another room

• A student pushes a locked door that does not move

• A student sits on the carpet

Force is a _______ or ________

• Simple, complex

• Up, down

• Push. pull

• In, out

What is the unit for distance

• Mass

• Metre

• Mile

• Momentum

Which is the nest example of work being done?

• Doing homework

• Lifting a box

• Holding a box

• Sitting on a box