Physics: Simple Machines and Relativity

In the wheel and axle simple machine, like the well, the larger the wheel you crank, the more distance it is for each turn of the handle, but the _____________ it will be to turn the wheel.

In a wheel and axle simple machine, like the Knex well that we made in class, the handle that we turned to raise the bucket was the ________ and the pole that the string was wrapped around was the ________.

In a simple machine, the word “__________” refers to the force that is applied to one part of the machine in order to do work.

Relativity means that details about 1 thing are considered as compared to other things. For example, the height of a 3 year old is considered _______, as compared to an infant, but _________, as compared to a 12 year old

For a lever, we made a K’nex balance, which acted as a simple lever, another simple machine. By moving the load (which was a paper clip with washers on it) closer to the fulcrum, we needed _________ effort (weight) to balance it.

In a sailboat there is a compound pulley to raise a sail (like a flag on a flagpole.) Using the K'nex pulley, we pulled the string a _____________ distance than the “sail” was raised, making it ___________ to raise the sail.

With an inclined plane, moving a load up a ramp is easier than lifting it straight up because the effort needed is less. However, the _____________ it is moved is longer.

Simple machines make __________ easier to do.

What are the two types of relativity?

General relativity says time runs ___________ near a gravitational field.

In science, work refers to the use of __________ to move a load (object) through a distance. (hint- Work=____ x distance)

Which simple machine is represented by a ramp?

Which simple machine is represented by a hammer?

Which simple machine is represented by a screw?

Which simple machine is represented by a bicycle?

The mathematical calculation that tells how much easier a simple machine has made work is called ___________ advantage.

True or False: In the theory of relativity, all motion can be measured against a fixed point called, “the ether.”

In the early 1900’s a scientist named _________ ___________ developed the theory of relativity.

For gears, we made a K’nex crank fan. There were 2 gears: the driver gear (which was connected to the hand crank) and the driven gear (which was connected to the fan.) Which set-up with the gears made the fan go the fastest?

Using the K-nex ramp in class, we discovered that moving the object up the steeper ramp required more ___________ of force than moving the same object up a longer, less steep ramp.

Special relativity says that measurement of motion depends on 2 things:

Which simple machine is represented by a see-saw?

Simple Machines make work easier by spreading the effort needed over a longer distance, thereby requiring less __________ .