1. Letting People In
Alright, This is one of the most important parts of a party, letting the people come in. When people arrive, you don't want to always be at the door to open it or hold it open when they come in. You need a door holder! A door holder needs/does prevent the creation of a force for a torque, a rotation. This door holder creates a lever arm. A lever arm is the perpendicular distance from the axis of rotation from which the force is applied. This door holder, which is now a larger lever arm helps overpower the force from the door (Torque = F*leverarm). The best place is to put the door holder at the end of the door where the handle is, this creates such a large lever arm to hold the door open. Now your guest can join the party with their full hands easily!
2. MiniGames (Bowling)
You need games at this party! Luckily, you found a bowling ball and 5 pins! You set the pins up 20 feet away from a line of tape, where you start to roll the ball. When you roll the ball, the ball knocks down the pins, you then wonder how!? According to Newton's First Law, an object at motion/rest tends to stay at motion/rest until acted upon another force. The pins were at rest and the ball was in motion, after you rolled it. When the ball hits the pins, the pins went from rest to moving, from the outside force from the ball, and the ball was stopped by the outside force which was the pins. This is going to be a great minigame for a party!
3. Water Guns!
Now this party is getting more exciting! you found a set of 4 water guns! You fill them up but find 2 of the 4 don't push water out as hard. You find out that the 2 water guns don't push the water out with a lot of force for its mass. Hey! Newton's second law describes this. Acceleration=Force/Mass. Since the water guns don't push the water with great force, they won't have that great of an acceleration. The party people with these water guns are not going to do so well, so don't tell them!
4. Horsey Races!
Of course there has to be a race in a party! Now, running is not that fun so you think of adding another person to the teams. Yep, you think of riding on each others backs! You want to win though, because this is your house and no one beats you at your house, except you! To win this you think of a strategic plan. To win, you tell your partner that you ride on to lean a little forward, this is to balance the weight distribution of the both of you. This is an example of putting support under your centre of gravity. If your partner didn't lean forward, you guys would have so much troubles and fall backward. Falling backwards is the cause of having a unsupported centre of gravity, which creates a torque the side that has the most.
5.1 Wait What?
The bowling ball doesn't roll on the grass outside at all! This is because the grass gives to much friction for the ball to roll. This is another example of Newton's first law, so you make a wood floor out of board from under your house you haven't used yet.
5.2 Slip N Slide
This fixing of the floor of the ball gave you another idea for the party! A Slip N Slide! Here you lay out a tarp, you spray the people down and off they go slide down it. At the very end of the tarp you put pillows so people don't hurt their selves. Why did you put pillows there? If you have a person slide down, they will end up having friction equal the same amount of force they slid down with. This will equal to 0N of force so the person will be at constant velocity at equilibrium. They won't be able to stop! Thanks to the pillows though! This is also an example of moving boxes, if the box is at 0N (equilibrium) it won't be able to move because the friction force equals your force. If you add more force, then it'll move.
6. Moving Dangerous Things Out of The Way
Now you notice the sharp cube in the way of running to the slip n slide. You decide to push it out of the way. While pushing it, did you know it also pushes you? Yes, this is true, Newton's third law states that every action has an equal and opposite reaction. So when you push on the box, the box pushes you. Just like when you walk you push ground back, while ground pushes you forward. The pushing on the box is the action and the box pushing you is the reaction.
7. Cotton Candy Machine
You found your old cotton candy machine and set it back up. Once you did so you find out that you put the syrup/powder on the outside of the rim of the machine. When you turn the machine on, it spins slowly, why? You need to be making a lot of these fast! Well, Angular momentum is the momentum in a spinning/rotation. To have a greater this, you need to increase your rotational velocity, but how can you do so when you have a set angular momentum (conservation of angular momentum). You decrease the rotational inertia, to do this you pour the powder closer to the centre of the machine. Now it spins so much faster! Angular Momentum= Rotational inertia*Rotational velocity. Conservation of Angular Momentum is: Angular Momentum=Angular momentum (Increasing or decreasing one of the 2 factors.
8. Towels!
You used your towels last week and you still haven't washed them! You pop them into the washer, and start to think how does a washer work? Washers cause the clothes to become in the centripetal force, which makes a body object follow a curved path. Next the water is coming from inside the machine from those holes you saw. This water follows a tangential path, straight path. Since both of opposite, this allows the water to get to the clothes and wash them.
9. Lights
Alright. You think of when it gets late during the party. You need some cool lights. You find some of your old christmas lights and hang them up. Then you plug them in and notice they all don't work. This is because of one light bulb is blown, but why does one affect them all? This is because they are set up in a series circuit, so since the light bulb is out it can't complete the circuit to flow current to the others. Dang! You don't have extra lights! You find some extra wire though and do some engineering. You take the lights apart from the wire and place them in a parallel circuit. This makes every light work on its own wire but causes the current and voltage to go up in the whole system.
10. BALLOONS!
You got 30 minutes until your guest arrive and you haven't set up the balloons! You forgot to get helium and you don't have time, so you start blowing them up. Since oxygen is in them, all the balloons do is fall o the ground. That's boring you think. So, you start shaking and rubbing them only our head, this causes them to charge through friction, and your hair steals the positive charges and your balloon is now negatively charged. When you go near a wall the positive charges of the wall attract to the negative charges of the balloon. When the positive charges separate from their negative charges in the wall, the wall becomes polar. Coulomb's law states that F=kq1q2/d^2, so since the attracting charges are closer, the attraction force will be greater than the reeling charges (the negatives) and attract the ballon to the wall. You do this like a ton of times and now your balloons are all on the wall.
I hope this helps you learn more physics while setting up a party. I also hope you learned that this is the way to set up a cool party!
Peace
-Physician Gannon