Exploring Simple Machines

What is a simple machine?

• A simple machine is a type of complex machinery.

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

• A simple machine is a device that only increases speed.

• A simple machine is a tool used for cooking.

Name the six types of simple machines.

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

• lever, pulley, inclined plane, block, gear, wheel

• gear, lever, wheel, axle, pulley, block

• lever, wheel, axle, ramp, spring, chain

How does a lever work?

• A lever works by using a fulcrum to amplify force, allowing a small input force to lift a larger load.

• A lever is used to measure weight without any force applied.

• A lever works by pushing down on one end to create friction.

• A lever functions by balancing two equal weights on either side.

What is the formula for mechanical advantage in levers?

• MA = Load Force / Effort Force

• MA = Length of Load Arm / Length of Effort Arm

• MA = Length of Effort Arm / Length of Load Arm

• MA = Effort Distance / Load Distance

Explain the difference between a first-class, second-class, and third-class lever.

• First-class lever: fulcrum between effort and load; Second-class lever: load between effort and fulcrum; Third-class lever: effort between load and fulcrum.

• First-class lever: load between effort and fulcrum; Second-class lever: fulcrum at one end; Third-class lever: effort at one end.

• First-class lever: effort at one end; Second-class lever: fulcrum at one end; Third-class lever: load at one end.

• First-class lever: effort and load at the same point; Second-class lever: fulcrum at the center; Third-class lever: load at the center.

What is an example of a wheel and axle?

• A steering wheel

• A bicycle pedal

• A doorknob

• A gear lever

How does a pulley function?

• A pulley is used to store energy for later use.

• A pulley only increases the weight of the load.

• A pulley can only lift objects vertically.

• A pulley changes the direction of force and reduces the effort needed to lift a load.

What is the purpose of an inclined plane?

• To reduce the amount of force needed to lift objects.

• To increase the speed of lifting objects.

• To create a flat surface for rolling objects.

• To provide a stable base for heavy machinery.

Describe how a screw can be considered a simple machine.

• A screw is a simple machine that only rotates without any linear movement.

• A screw is primarily used for cutting materials rather than fastening them.

• A screw is a type of lever that amplifies force by pivoting around a fulcrum.

• A screw is a simple machine that converts rotational motion into linear motion, allowing for the application of force.

What is the relationship between force and distance in simple machines?

• In simple machines, an increase in distance results in a decrease in the required force.

• Force and distance are unrelated in simple machines.

• In simple machines, an increase in distance requires an increase in force.

• Simple machines do not affect the relationship between force and distance.