PLTW POE

What is a simple machine?

• A simple machine is a complex device that doesn't change the direction or magnitude of a force.

• A simple machine is a term used in biology to describe a specific organ in organisms.

• A simple machine is a type of software used for calculations.

• A simple machine is a mechanical device that changes the direction or magnitude of a force.

Name the six types of simple machines.

• lever, pulley, wheel and axle, inclined plane, wedge, screw

• gear, spring, magnet, ramp, nail, bolt

Define mechanical advantage.

• Mechanical advantage is a measure of the force amplification achieved by using a tool, mechanical device, or machine system. It is calculated by dividing the output force by the input force.

• Mechanical advantage is only applicable to electrical systems.

• Mechanical advantage is calculated by multiplying the output force by the input force.

• Mechanical advantage is a measure of the speed achieved by using a tool.

How is mechanical advantage calculated?

• Mechanical Advantage = Output Force / Input Force

• Mechanical Advantage = Output Work / Input Work

• Mechanical Advantage = Output Distance / Input Distance

• Mechanical Advantage = Input Force / Output Force

Explain the concept of energy transfer.

• Energy transfer involves the conversion of energy from one form to another or the movement of energy from one object to another.

• Energy transfer involves the movement of energy from one object to another without any change in form.

• Energy transfer only occurs in living organisms.

• Energy transfer is the process of converting matter into energy.

Give an example of energy transfer in a mechanical system.

• Pushing a swing

• Jumping on a trampoline

• Pulling a wagon

• Twisting a screwdriver

What are power systems in the context of engineering?

• Power systems are related to mechanical engineering only.

• Power systems refer to the network of water distribution in civil engineering.

• Power systems in engineering are limited to software applications.

• Power systems in engineering refer to the network of electrical components used to generate, transmit, and distribute electricity.

How is power calculated in a mechanical system?

• Power = Time x Distance / Force

• Power = Force x Time / Distance

• Power = Distance x Time / Force

• Power = Force x Distance / Time

Describe the components of a mechanical system.

• Cogs

• Wheels

• Gears, levers, pulleys, springs, shafts

• Belts

What is the Engineering Design Process?

• A recipe for baking cakes

• A list of popular movies

• A guide to gardening

• A series of steps that engineers follow to come up with a solution to a problem.