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science

quiz questions

QuestionAnswer
how many types of simple machines are there? 6
a lever consists of a bar that pivots about a fixed point called what? the fulcrum
when two or more simple machines work together, it is called what? a compound machine
what is a simple machine, and what are the six types of simple machines? a machine that makes work easier in one movement. wedge, screw, inclined plane, lever, and wheel and axle
which factors determine whether a lever is a first call lever, second class lever, or third class lever? the location of the fulcrum, the input force, and the output force
how does the MA of a 6-m ramp compare with the MA of a 4-m ramp if both are used to load crates onto trucks that have cargo areas that are 1 m off the ground? increasing the weight and decreasing the height of the inclined plane increase the MA.
what are three examples ofa wedge? a door stop, a crowbar, and a can opener
what are three examples of a lever? a hammer, toilet flusher, and a door handle
what are three examples of a pulley? a flag pole, blinds, and a sail boat
a wheelchair ramp is an example of what kind of simple machine? an inclined plane
roller skates are an example of what kind of simple machine? wheel and axle
a nutcracker is a example of what kind of simple machine? a lever
what is an inclined plane wrapped around a cylinder? a screw
what is a flat, sloped surface? an inclined plane
what is called a lever's pivot point? the fulcrum
what happens to the efficiency of the overall machine as more simple machines are added to it? the efficiency increases
why does a wedge that splits wood is an example of a compound machine? the wedge is doing work to make it easier to split the log and its using two simple machines so make work easier in more than one movement
what is a compound machine? two or more machines operating together to make work easier using more than one movement
Created by: westemac4044
 

 



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