A
What is measured by ho much force it takes to move an object and how far the object moves?
Work
What is a bar that turns on a point called?
a lever
What is a wheel with a groove that holds a rope?
a pulley
What is an inclined plane wrapped around a cylinder?
a screw
Is a dog riding a skateboard the load or the effort?
Load
Mark ran into the outfield to catch the baseball. Did he do any work?
Yes, because he moved over a distance.
What simple machine is used to move a flag up a flagpole
a pulley
What is a flat, slanted surface?
an inclined plane
When is work done?
When a force moves an object over a distance.
Is pushing a wheelbarrow full of pumpkins an example of the effort or the load?
the effort
Why is friction beneficial?
It keeps you from slipping and sliding.
What is a wheel with a rod running through it called?
a wheel and axle
What does an inclined plane reduce the amount of? (It's needed to move an object against gravity to a higher position)
effort
How do simple machines help people?
they make work easier.
The force applied to cause a simple machine to do work is called what?
the effort
Motion
When a wheel of a wheel and axle turns one time, the wheel does what?
travels a greater distance than the axle does
What is a simple machine that is made up of one or more inclined planes and is used to force materials apart?
wedge
What are two forces we encounter everyday?
friction and gravity
What is the weight being moved called?
the load
What are a wheelbarrow and a rake examples of
levers
When the axle in a wheel and axle turns with greater force than the wheel does, does the axle move a greater or lesser distance?
less distance
What is the ability to do work called?
energy
When using a lever, the more distance there is between the effort and the fulcrum, the _____ effort is needed to move the load.
less
When using a pulley to lift a box, the direction of the effort is _____, and the direction of the load is ______.
down
up