rigid bar that is free to pivot or rotate on a fixed point
What is the definition of a lever?
100
flat, sloped surface
What is the definition of an inclined plane?
100
definition of a screw
What is an inclined plane wrapped around a cylinder?
100
ability to do work or cause change
What is energy?
100
screwdriver, wheels of a vehicle, steer of a boat
What are examples of wheel and axles?
200
the fixed point is also known as a...
What is a fulcrum?
200
distance
What is how an inclined plane makes work easier?
200
how a pulley makes work easier
What is changes direction?
200
two types of energy
What are kinetic and potential energy?
200
law of conservation of energy
What is energy cannot be created or destroyed?
300
classification of levers
What are 1st class, 2nd class, and 3rd class levers?
300
a wedge
What is a device that is thick at one end and tapers to a thin edge or point at the other end?
300
to increase the MA (mechanical advantage) of a screw
What is increase the amount of threads and/or decrease the distance between the threads?
300
kinetic energy depends upon these two factors
What are speed and mass?
300
combines more than one simple machine
What is a compound machine?
400
determines the classification of a lever
What is the location of fulcrum in relation to input and output forces?
400
difference between wedge and inclined plane
What is an object moves along an inclined plane and the wedge moves rather than the object?
400
name of pulley which has both fixed and movable pulley
What is a block and tackle pulley?
400
difference between kinetic and potential energy
What is kinetic energy includes energy an object has in motion and potential energy includes the energy a stationary object has the potential of exerting?
400
two connected objects that rotate on a common axis
What is a wheel and axle?
500
a wheelbarrow
What is an example of a 2nd class lever?
500
a door stopper, zipper, and knife
What are examples of a wedge?
500
difference between fixed and movable pulley system
What is a fixed pulley is stationary/does not move and a movable pulley moves?
500
points at which a dropped tennis ball has the both the greatest and least amount of kinetic energy
What are the peak (least) and immediately before impact (greatest)?
500
five forms of energy
What are nuclear, thermal, electrical, electromagnetic, and chemical?