Physics 12 Journal help, please

[LoriAnn]

Hey, any ideas/input would be very helpful! Thanks!

1. It is sometimes said that water is removed from clothes during the spin cycle by centrifugal force throwing the water outward. Explain if this is correct by describing what centrifugal force is and how the spin cycle helps "dry out" the clothes.



2. It is said that in ancient times a rich man with a bag of gold coins froze to death stranded on the surface of a frozen lake. Because the ice was frictionless, he could not push himself to shore. What could he have done to save himself had he not been so miserly?



3. A proton and an electron are held in place on the x axis. The proton is at x = -d, while the electron is at x = +d. They are released simultaneously, and the only force that affects their motions is the electrostatic force of attraction between them. Which particle reaches the origin first? Give your reasoning.



4. A particle is oscillating in simple harmonic motion. The time required for the particle to travel through one complete cycle is equal to the period of the motion, no matter what the amplitude is. But how can this be, since larger amplitudes mean that the particle travels further? Explain in terms of energy.

 

[dnp33]

1. centrifugal force is outward force associated with rotation, how the outward force would effect the water molecules

3. think about Newtons second law F=ma, which is can be arranged to a=F/m.
does a proton or newtron have greater mass?

4. i don't know what the oscillation equations are off hand but the idea is greater amplitude results in larger energy in the system which results in greater kinetic and potential energy.

PS it helps if you put equations your using into the question so that it can be explained in terms of what you are doing at the time.

 

[thomate1]

1. The idea that centrifugal force is responsible for removing water from clothes during the spin cycle is not entirely accurate. Centrifugal force is a fictitious force that appears to act on an object moving in a circular path, but it is actually an inertial force caused by the object's tendency to resist changes in its motion. In the case of a washing machine, the clothes are thrown outward due to the force of gravity, which is acting on the clothes and the water. As the clothes spin, the water is forced outwards due to its lower density compared to the clothes, which allows it to separate from the fabric and drain out of the machine. This process is aided by the fact that the spin cycle creates a centrifugal force that helps to push the water outwards. So while centrifugal force is involved in the process, it is not the main driving force behind the water being removed from the clothes.

2. If the rich man had not been so miserly, he could have used his bag of gold coins to create friction between himself and the ice. By throwing the coins in front of him, he could have created enough friction to push himself towards the shore. Alternatively, he could have used the coins to create a makeshift sled or raft to slide or paddle his way to safety.

3. The electron would reach the origin first. This is because the electrostatic force of attraction between the proton and electron is inversely proportional to the square of the distance between them. As they move towards each other, the force increases, causing the electron to accelerate faster and reach the origin first.

4. The time required for the particle to travel through one complete cycle is equal to the period of the motion because the energy of the particle remains constant throughout the motion. While the amplitude may change, the energy of the particle is determined by its mass and the frequency of the oscillation, which remains constant. This means that the particle will always take the same amount of time to complete one cycle, regardless of its amplitude.