What simple machine are tweezers?
Lever
What type of simple machine is a slide?
incline plane
What type of simple machine is a jar lid?
screw
What simple machine are stairs?
incline plane
What simple machine is a knife?
wedge
What is done when a force causes an object to move in the direction of the force?
work
What are the 2 things that must occur in order for work to have been done?
1. The object must move 2. The direction of the object's motion is the same as the direction of the force.
What do the letters in the formula W = F x D stand for?
Work= Force x Distance
What ancient Greek philosopher identified the lever, pulley and the screw as simple machines?
Archimedes (287-212 bc)
the measure of the force amplification achieved by using a tool, mechanical device or machine system.
mechanical advantage
What simple machine is a hand cranked pencil sharpener?
wheel and axle
What simple machine is used to lift sails on a boat?
pulley
What is the fixed support called that a lever arm sits on?
fulcrum or pivot point
When does a typical rollercoaster have the most potential energy?
At the top of the first hill.
What type of energy increases as a rollercoaster picks up speed as it descends a hill?
Kinetic Energy
Name three criteria of your rollercoaster design challenge.
1. Needs either a turn or a loop 2. Must be at least 24" of track length 3.At some point the track needs to be below the finish 4. ball needs to land in cupa
