the continuous physical force exerted on or against an object by something in contact with it.
100
What is a pulley used for
A pulley is used to lift heavy objects.
100
How is a leg a simple machine
A leg is a simple machine because when you run a chain reaction goes off from your hips to feet.
100
How many people does mechanical energy power?
about 1 billion people
200
What is air pressure
air pressure is the force exerted onto a surface by the weight of the air.
200
How is a wheel and axle a simple machine
wheel and axle is a simple machine because when the wheel turns a chain reaction makes the vehicle move
200
How are parts of a spine simple machines?
The spine has screws that keep it together without them your whole spine will fall apart.(Not actual screws)
200
How does Hydropower work?
Turbines spin which powers a generator and creates electricity.
300
Why do ears pop at high altitude?
Because the atmosphere is pushing down on air to make ears pop,
300
What is a lever
A lever is used to lift an object you put effort on one side and the object goes on the other side.
300
How is a neck a lever?
The Neck acts as a lever when you tilt your head down then you apply the force of the side you are tilting your head down.
300
Name 3 examples of Mechanical energy
Bow and arrow
Shooting a rubber band with your finger
A Roller Coaster
Lifting weights
A bike
400
What is Friction.
Friction is the force that slows everything down without it car brakes would not work.
400
What is an Inclined plane used for?
to move heavy objects.
400
How is a shoulder blade a wheel and axle?
The shoulder is a wheel and axle the ball or shoulder blade is the wheel and your socket is the wheel.
400
What is the gif on the first orange slide
A dancing skeleton
500
In what sport is there reduced friction making the players move easily?
Ice Skating or Ice Hockey
500
Who Invented the lever and pulley?
Archimedes invented the lever and pulley.
500
How is a foot a fulcrum?
The foot is like a fulcrum because when you move your ankle that makes a chain reaction to move your foot.
500
What is the definition of mechanical energy
Mechanical energy is the sum of kinetic and potential energy in an object that is used to do work. In other words, it is energy in an object due to its motion or position, or both.