Simple Machines
A stapler is an example of what kind of simple machine?
Lever
Using a lever makes work ______.
Easier
The four forces involved in flight are?
lift, drag, gravity, thrust
The forces that work against living and non-living things attempting to fly are?
drag and gravity
Placing the fulcrum near the load makes it easier or harder to lift the load?
Easier
Which two simple machines make a wheelbarrow?
Wheel and axle and lever
The most efficient wing shape is called an _______.
airfoil
What is the only mammal that can fly?
Bats
A large plank and a large rock can be used to create which simple machine?
A lever
What simple machine would raise a sail on a sail boat?
A pulley
Newton's 3rd law is?
For every action there is an equal and opposite reaction.
The force of gravity pulling on a mass is called?
Weight
What two simple machines are used in an electric saw?
Wheel and axle and a wedge
Name all 6 simple machines.
Wheel and Axle, Inclined Plane, Pulley, Screw, Lever, Wedge
Air always travels from _______ pressure to ________ pressure.
high to low
Why can't humans fly?
Arms do not have airfoi shape.
Muscles can not produce rapid arm movement.
Ratio of weight between arms and bodies is wrong.
We do not have the proper anatomy.
What simple machine can change the direction of a force?
Pulley
An inclined plane wrapped around a cylinder is called a _________________.
A screw
The amount of matter in an object or substance is called?
Mass
3 factors that contribute to the flight of an airplane are:
thrust, angle of attack, airfoil shape of the wing.