iGCSE Energy Topic

What is the unit for work done?

• N

• J

• Nm

• W

A hairdryer has a power rating of 500W. How much energy is generated in 2 minutes?

• 1000J

• 250J

• 60 000J

• 4.16J

An e-scooter is travelling at 5m/s. It has a total mass of 60kg (including the rider). How much kinetic energy does it have?

• 150J

• 3000J

• 7500J

• 750J

A person weighing 60kg lifts a book a height of 2m in 20s. The book weighs 500g. What is the gravitational potential energy gained by the book?

• 1200J

• 10 000J

• 10J

• 30J

A trolley is pushed a distance of 10m in 20 seconds with a force of 50N. Calculate the power.

• 0.5W

• 25W

• 2.5W

• 200W

What is the unit for force?

• N/kg

• Nm

• N

• J

Calculate work: A 100 Newton force is applied to move a 15 kg object a distance of 5 meters?

• 20 Joules
• 75 Joules
• 500 Joules
• 1500 J

A 5000N block is lifted 10 m. How much work was done?

• 50000 J
• 5000 J
• 500 J
• 50 J

How much work is produced when 350 N is used to move a car 5 m?

• 70 J
• 1750 J
• 355 J
• 175 J

Which of the following is the best example of work being done.

• doing homework

• lifting a book

• pushing a locked door

• holding a box