Inclined Planes
Another name for an inclined plane is a
ramp
The main part of a lever is a bar or rod which balances on a _________________.
fulcrum
what makes a pulley?
A doorknob is an example of a
wheel and axle
flagpole
pulley
On an incline plane, if the RF is greater than the EF will the load move? Explain
Answers may vary
For a lever to be a first class lever the fulcrum needs to be ..
between the EF and the load
As you increase the amount of pulleys, what happens to your EF?
An axe is an example of a
wedge
lever
What happens as the incline increases?
The EF increases
To increase the mechanical advantage of a lever, where would you move the load?
closer to the fulcrum
Let's say you wanted to use a pulley to lift a flag up a flagpole. If you wanted to lift the flag 10 meters in the air, how far would you have to move the rope?
10 meters
What simple machine is used to open the door
wedge
escalator
wheel and axle, pulley, incline plane
What are two ways to increase the efficiency of an incline plane?
Make it longer
reduce the height
When using a lever, your work is made easier. However, what does the simple machine make you do in order to make this work easier?
make the lever longer
How much force would be needed to lift the 150 N weight if using TWO pulleys?
75
A pulley contains this other simple machine
a wheel and axle
bike
wheel and axles & pulley
Students pulled the same mass up an inclined plane that was 20 cm, 30 cm, and 40 cm long. Each time, they used a spring scale to measure the force needed to pull the mass up the inclined plane. What did they conclude?
The least amount of force was needed on the 40 cm inclined plane.
What is the LOAD of the lever as you stand on your tiptoes?
your whole body
Neil studied how a pulley helps move an object. Neil tied a rope to an object with a mass of 10 kilograms (kg) and attached it to a pulley. He then pulled down on the rope. When Neil pulled down on the rope, which did he most likely learn about the force required to lift the object
A ferris wheel is what kind of other simple machine
a wheel and axle
can opener
screw, wheel and axle & lever