Simple and Compound Machines
What is the formula for power?
Work / Time
What type of motion is the movement of a swing?
Oscillatory
What would happen if someone pushed on a building and the building doesn't move, is work being done on it?
No work is being done.
What type of energy is this?
Applying a voltage to a conductor gives the conductor electromagnetic energy because the electrons have not yet yielded to the electromagnetic force.
Electrical Energy
What is the Formula for AMA?
Resistance Force / Effort Force
What is a Rube Goldbug device?
A device with complicated mechanics to complete simple tasks.
What does the E in STEAM Mean? (Double points if you get every letter meaning)
S: Science T:Technology E: Engineering A: Arts M:Mathamatics
Kinetic: Energy in motion
Potential: the stored energy in an object due to its position, properties, and forces acting on it.
What is Mechanical advantage?
The measure of the change in force magnitude achieved by using a machine.
What are the four types of motion?
Reciprocating, Linear, Oscillating, Rotational
What simple machine is a triangle-shaped tool, and is a portable inclined plane? It shares its name with a golf club, used for accurate short distance lobs.
A wedge
What type of energy is this?
Stretching a rubber band gives the rubber band electromagnetic potential energy because the rubber band’s molecules have been forced apart, overcoming the molecules’ electromagnetic attraction.
Elastic Energy
What is the formula for IMA?
Effort Distance / Resistance Distance
A group of people total 500N to push a car 35 m in 20 minutes. How much power was used to push the car?
One minute to do the math, good luck!
Work = Force * Distance
Work = 500N * 35m
Work = 17500J
20 minutes = 1200 seconds
Power = Work / Time
Power = 17500 / 1200s
Power = 14.6 Watts
What type of energy is this?
Lifting an object away from the earth’s surface gives the object gravitational potential energy because the object has moved against the earth’s gravity.
Gravitational Energy
What is the various forms of potential energy?
Gravitational, Elastic, Electrical, Chemical, Thermal(heat)
Where might you encounter a complex machine that converts several types of motion in real life?
This doesn't have a full and correct answer but if you answered I hope you are correct.
Ex: marble runs, domino chains, squeezing toothpaste onto a brush, ect
What is the design process in order?
find the problem, do the research, brainstorming solutions, creating a prototype, test the prototype, and, implementing the design.
What type of energy is this?
The electrons in molecules of fuel have electromagnetic potential energy. They are too far away from the nuclei of the product that can be formed during combustion.
Chemical Energy
A solar panel absorbs 250J of solar energy per second, but produces 100J of electrical energy in the same time. How efficient is the solar panel?
First team to solve this wins, Go!
Eoutput/Einput
100J/250J
0.4 * 100 = 40
40% efficiency