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*Step 1: attach a boomerang of your hovercraft.
*Step 2: answer the questions.

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(i) How does it work? Relate the experiment you carried out to frictional force.
Answer: Air flow from the balloon exiting the bottom of the CD creates an blanket of air that reduces the frictional force between the CD and the table.

(ii) Do you think the size of the balloon affects the CDs ability to hover?
Answer: Yes, the more air there is in the balloon, the more airflow there is to create a blanket of air.

(iii) Do you think a helium balloon will work better than an air filled balloon?
Answer: No, a helium balloon will just float and lift the entire hovercraft off the table and onto the ceiling

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The experiment failed due to experimental errors. However, we manage to learn and find the answers through online resources.
(i) How does it work? Relate the experiment you carried out to frictional force.
The air created a small space between the CD and surface. Thus, it lessen the frictional force and allowing it to float.

(ii) Do you think the size of the balloon affects the CDs ability to hover?
Yes, the bigger the balloon, the longer it hovers.

(iii) Do you think a helium balloon will work better than an air filled balloon?
Yes, the gas in the helium balloon allows the CD to float in the air. without touching the ground.

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(i) How does it work? Relate the experiment you carried out to frictional force.
- (i) The small hole in the centre of the CD forces air escaping from the balloon downwards. This creates an opposite force upwards which lifts the hovercraft off the ground. The CD spreads out this force evenly along the bottom of the hovercraft.

(ii) Do you think the size of the balloon affects the CDs ability to hover?
Yes it does. The bigger the balloon, the more it hovers.

(iii) Do you think a helium balloon will work better than an air filled balloon?
No, helium balloon will make the balloon float up. However, it will not hover around like an air filled balloon.

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(i) How does it work? Relate the experiment you carried out to frictional force.
Air comes out from the balloon to create  space between the CD and the table, and the friction force is reduced, therefore the CD can glide around the table easily, aided by the movement of air
(ii) Do you think the size of the balloon affects the CDs ability to hover?
Yes, the more air there is, the longer the CD can hover
(iii) Do you think a helium balloon will work better than an air filled balloon?
Maybe... We think that the helium will lift the CD off the table slightly, causing there to be more space in between the table and the hovercraft, but it won't be lifted too high since the CD is heavy.

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Ai Lyn and Ash
- unable to complete the CD hover craft, our glue did not dry when we attempted to build it.

(i) How does it work?
Relate the experiment you carried out to frictional force.
As the balloon releases air, it lessens the friction between the CD and the surface that it is moving on. Thus, allowing the CD to float.

(ii) Do you think the size of the balloon affects the CDs ability to hover?
Yes, the size of the balloon does affect the CD's ability to hover. The bigger the balloon, the more air there is which enables the CD to hover for a longer period of time.

(iii) Do you think a helium balloon will work better than an air filled balloon?
Yes. Since helium air is lighter, it may allow the CD to hover easier.