4.03 Simple Machines

4.03 Simple Machines & Mechnanical Advantage

TED with Mrs. Sidney

Multiple Choice

A wheelbarrow is an example of what type of simple machine?

• First Class Lever

• Second Class Lever

• Third Class Lever

• Forth Class Lever

Multiple Choice

There are how many different types of simple machines?

• 6

• 9

• 4

• 12

Multiple Choice

Work is the _____ applied on an object times the ______ traveled by the object.

• Distance, time

• Force, Effort

• Effort, Time

• Force, Distance

Multiple Choice

Which of the following is NOT a purpose of a simple machine?

• Reduce the effort force needed to move a load

• Transfer kinetic energy (the energy or motion)

• Reduce the time needed to move an object

• Change the type of motion

Multiple Choice

Effort force can be applied when using a

• Wheel or axle

• Wheel only

• Axle only

• Both wheel and axle

Multiple Choice

If a pulley system used to lift lumber on a construction site has 3 ropes in it, what is the Ideal Mechanical Advantage?

• 1

• 0

• 3

• 6

Multiple Choice

What simple machine is a flat surface at an angle used to move heavy object to a higher level much easier?

• Screw

• Inclined Plane

• Wedge

• Wheel & Axle

Multiple Choice

Where is the effort force applied when using a wedge?

• All around

• Top to bottom

• Sides equally

• Top of the height

Multiple Choice

An inclined plane wrapped around a cylinder used to create rotary motion is what type of simple machine?

• Screw

• Lever

• Pulley

• Wedge

Multiple Choice

Where is the fulcrum located on a first class lever?

• In front of the load and effort

• Between the load and the effort

• Between the fulcrum and the effort

• Behind the load and effort

Multiple Choice

The pivot where the rigid bar of a lever rest is called what?

• Rotational momentum

• Stress point

• Pivot Point

• Fulcrum

Multiple Choice

Simple Machines are devices with few or no moving parts that are used to modify motion and force in order to perform _____?

• Work

• Effort

• Dance

• Mechanical Advantage

Multiple Choice

What is determined by using the actual physical measurements of force? Usually output force over input force.

• Simple Machines

• Actual Mechanical Advantage

• Work

• Ideal Mechanical Advantage

Multiple Choice

Ideal Mechanical Advantage does NOT take what into consideration?

• Distance traveled

• Load Type

• Friction Lose

• Effort force

Multiple Choice

A third class lever, like a fishing pole, has a mechanical advantage of what?

• Less than 1

• Greater than 1

• Equal to 1

• All of the above

Multiple Choice

If a screw has the following markings, 1/2 - 24 UNC, how many rotations would it take to drive the screw 1 inch?

• 12

• 1/2

• 1/24

• 24

Multiple Choice

If a screw has the following markings, 1/2 - 24 UNC, what is the diameter of the screw?

• 1/2 Inch

• 24 inches

• 1/24 inch

• 12 inches

Multiple Choice

What simple machine has the function of separating material or tightening spaces?

• Lever

• Pulley

• Wedge

• Inclined Plan

Multiple Choice

A door knob is a real world example of what type of simple machine?

• Wedge

• Block & Tackle

• 1st Class Lever

• Wheel & Axle

Multiple Choice

A fixed pulley is used to raise objects to a place _____ where you are pulling, where a movable pulley is used to raise objects from _____ where you are pulling.

• Above, below

• Below, above

• Below, below

• Above, above