When you apply a force on an object that causes the object to move some distance.
100
What do machines do?
They make work easier. They also change the amount of force you apply over a distance when you apply the force.
100
What is an inclined plane?
A flat, sloped surface.
100
What is a lever?
A rigid (Sturdy) bar that is free to pivot (Rotate) on a fixed point.
100
What is a wedge?
A device that is thick at one end and tapers to a thin edge at the other end.
200
When you move an object and it does not move, what is happening?
Work is not being done, no matter how much force is exerted.
200
What are three types of simple machines? (These won't be in order)
1. Wheel and Axle
2. Screw
3. Pulley
200
What are some examples of inclined planes?
1. Ramp
2. Ladder leaning against something
3. Road going up a mountain
200
What are some examples of levers?
1.
2.
3.
300
Work= Force x Distance
How do you calculate work?
400
When you pick up a heavy set of logs and carry them across the yard, when are you doing work? When are you not doing work? How are you doing work and how are you not doing work?
You are doing work when you pick up the logs and you are not doing work when you carry them across the yard. You are doing work by exerting a force in the same direction; vertical. You are not doing work by moving the logs horizontal.
400
List four parts in your body that act as simple machines.
1. Incisors
2. Muscles, tendons, and bones
3. Joint
500
Answer the problem.
Work=?
Distance= 17.6 meters
Force= 89 newtons
17.6 x 89= ?
Try to figure it out on paper. DON'T use a calculator.
1566.4
500
What are two examples of pulleys, screws, and wheel and axles?
Pulleys: Flagpole, cranes
Screws: Light bulb, jar lid
Wheel and Axles: Screw driver, Steering wheel