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Levers
Simple Machines: Lever
Question | Answer |
---|---|
resistance force | force of gravity |
fulcrum | pivot point |
lever | a bar that can turn on a fixed point |
resistance or load | the object being moved |
force | any push or pull on an object |
a lever can be used to multiply the ___ or change the ___ of the force | force, direct |
the _____ on the machine may be due to the force of gravity, friction, and inertia | resistance force |
in a ___ class lever, the load is placed between the force and the fulcrum | second |
a ___ class lever the force applied between the fulcrum and the load | third |
using a __ class lever, the force changes directions | first |
how many classes of levers are there | three |
which of the following is an example of a second-class lever | wheelbarrow |
which of the following is an example of a first-class lever | crowbar lifting lid off box |