Show:
Name the Machine
Classes of Levers
Work
Other... Problems
Work Problems
100
Incline Plane
A simple machine with no moving parts? (It's simply a straight-slanted surface)
100
1st Class
a see-saw or bottle opener?
100
Occurs when a force is applied to move an object a distance.
Define/describe work? (scientifically)
100
Gear
Simple machine with two toothed wheels connected directly or with a chain?
100
2 joules
A book weighing 1.0 newtons is lifted 2 meter, how much work was done?
200
Lever
A simple machine made with a rigid bar free to pivot (move) around a fixed point called a fulcrum?
200
2nd Class
A wheel barrel or door?
200
Force x Distance = Work
What is the formula to calculate work?
200
Screw
The bottom of a light bulb that tightens by turning it is an example of this simple machine.
200
45 joules
A force of 15 newtons is used to push a box along the floor a distance of 3 meters, how much work was done?
300
Pulley
A simple machine with a rope, belt or chain wrapped around a grooved wheel?
300
3rd Class
a fishing pole or an arm?
300
Movement
If there is no ____, there is no work.
300
Wedge
A nail is an example of this simple machine.
300
2000 joules
It took 500 newtons of force to push a car 4 meters, how much work was done?
400
Wheel and Axe
Made up of two circular objects of different sizes?
400
2nd Class
What type of lever is a door?
400
1. They can change the amount of force. 2. They can change the direction
How do simple machines make work easier? (two answers)
400
Screw
Simple machine that is an inclined plane wrapped and a spiral?
400
10 Newtons
It took 50 joules to push a chair 5 meters across the floor. With what force was the chair pushed?
500
Wedge
Double inclined plane that moves?
500
The jaw
An example of a 3rd Class lever in the human body? (hint:helps you eat food)
500
J = Joules
the unit to measure work?
500
Pulley
Simply machine that is a modification of a wheel and axle
500
Zero joules
A young man exerted a force of 9,000 newtons on a stalled car but was unable to move it. How much work was done?