Forces.

Motion - It's a push / pull.

Gravity - For an object to remain still, there has to be a balance.

Friction - The rubbing of two objects together.

Objects at rest remain in rest, objects in motion will remain in motion. In a straight line, remains in a straight line.

Force equals mass times acceleration.

For every action there is an equal and opposite reaction.

Which Bubble Gum is Best?

Chewing gum experiment You will be in groups of 3 students to test the which gum is the best for bubble, stretch and taste. Aim: To see which bubble gum makes the best Bubbles, has the best elasticity and keeps its taste for the longest. Hypothesis: I think that the Hubba Bubba will make the largest bubble and have the longest stretch. The ? will have the longest taste. Equipment: 3 different chewing gum brands stop watch ruler graph to record detail. Method: Place the first piece of chewing gum in your mouth and time how long it takes to keep its taste. Chew the gum and record this time on the chart. Using the same piece of gum blow a bubble. Record on the chart as 'no bubble', 'small', 'medium', 'large'. Test for elasticity. Keep all of the gum in your mouth and see how long you can stretch it. Measure it and record its length. Findings: Hubba Bubba - 1min 3 seconds - Medium Bubble - 37cm. Extra - 1min 15 seconds - No Bubble - 38cm. PK - 44 seconds - Small Bubble - 41cm. Hubba Bubba is best for blowing bubbles, while Extra an PK aren't so good. Hubba Bubba has best Bubble average and length in class, While PK had the longest taste in class, Conclusion: From what I think, Hubba Bubba is the best gum to buy when you want Bubble Gum. What makes bubble gum blow good bubbles? Artificial / Pure Rubber. How much sugar is in bubble gum? 6g for most, (Hubba Bubba, Extra.) What is the largest bubble gum bubble made? 50.8cm by (USA) Chad Fell, 24 April 2004.

Bouncing Balls.

Bouncing Balls

Aim:
I want to find out if there is a relationship between how high a ball is dropped from and how high it bounces up.

Hypothesis:

I believe that the concrete ground will make the ball bounce higher, than if it was on carpet.

Method:
The equipment that I will need is:

• Bouncy ball
• Ruler
• Stand with boss head and clamp

1. Attach the clamp to the stand.
2. Clamp the ruler onto the stand so that the zero mark is on the ground.
3. Hold the bottom of the ball on 50cm and drop.
4. Record the height of the bounce measuring the bottom of the ball.
5. Repeat the experiment twice more and record the average measurement.
6. Repeat the whole experiment using heights of 60cm, 70cm, 80cm, 90cm, 100cm

                                   
Variables:

Independent (changing) Variable = The height of the drop
Dependent (measured) Variable = The height of the bounce

Results:

Carpet:

Height of Drop	Height of Bounce
80cm	33cm
90cm	34cm
100m	34cm

Concrete:

Height of Drop	Height of Bounce
80cm	40cm
90cm	43cm
1m	51cm

Findings:

• 80 cm - Concrete: 40cm. Carpet: 33cm.
• 90cm - Concrete: 43. Carpet: 34.
• 1m - Concrete: 51cm. Carpet: 34cm. 

Discussion: I think the wind might've affected some of the drop heights.

Conclusion: I think concrete is more dense, and that made the ball bounce higher.                            Concrete is also much harder than carpet, and flatter, creating friction.

Evaluation: Concrete had an effect on the ball's bounce height.

Welcome to 2017!

It's only been four months since January 1st...

I'm a bit late to the party.