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Vocabulary Uno
Vocabulary Dos
How Do Simple Machines Help
People Do Work?
How Do a Pulley and a Wheel-and-Axle Help People Do Work?
How Do Other Simple Machines Help People Do Work?
100
A machine with few or no moving parts that you apply just one force to.
What is simple machines?
100
The use of force to move an object over a distance.
What is work?
100
Give an example of what a scientist would consider to be work.
lifting a box off the floor
100
Pulleys change the direction of _____________.
force
100
What two factors does an inclined plane trade off to change the way work is done?
distance and force
200
A simple machine made of a wheel with a line around it.
What is a pulley?
200
A simple machine made of a bar that pivots on a fixed point.
What is a lever?
200
What part of a hockey stick is the fulcrum?
where the hockey player holds the stick
200
What do you need to make a pulley?
lipped wheel and a line, such as a rope or chain
200
You didn't get a lot of sleep last night and you have to help your sister move boxes. Would you use a 4 foot ramp or 2 foot ramp to move? Why?
4 foot ramp. If you didn't get a lot of sleep, you must be tired and want to use less force. The less force you use, the longer the distance.
300
A simple machine that is a slanted surface. Give two examples of this machine.
What is an inclined plane? Examples: wheelchair ramp or skateboard ramp
300
A simple machine made of a wheel and an axle that turn together.
What is a wheel-and-axle?
300
What two things do you need to make a lever?
a fulcrum and lever
300
What must a wheel-and-axle do to be a simple machine?
The wheel and axle must turn together.
300
Name two ways you can use a wedge to change the way work is done.
axe to chop wood and cleaver to slice food
400
The fixed point on a lever.
What is a fulcrum?
400
A simple machine made of a post with an inclined plane wrapped around it. Give an example.
What is screw? Examples: wood screw or drill
400
Does a machine reduce the amount of work done? Explain.
No- it may reduce the force needed to do work but it cannot reduce the amount of work done
400
What two simple machines make up a fishing pole?
lever and wheel-and-axle
400
I have two ramps. Ramp 1 is 45 cm in length. The second ramp is 90 cm in length. What are two examples of forces (in Newtons) that would be appropriate for my two ramps?
Ramp 1: 90 N Ramp 2: 30 N
500
A simple machine made of two inclined planes placed back to back.
What is a wedge?
500
What type of simple machine is a wheelbarrow?
lever
500
Annie is using a screwdriver to pry open a can of paint. To get the lid to pop up,she has to press down on the screwdriver's handle. Why?
The screwdriver is acting as a lever to change the direction of the force on the other end to an upward force.
500
How is a screwdriver an example of a wheel-and-axle?
The handle is the wheel, and the shaft is the axle. When you turn the handle, the shaft turns too.
500
One screw has many threads close together. Another screw has few threads, and they're spread out. Which screw is like a steep inclined plane? Explain.
The screw with few threads spread out because the slope is shorter and requires more force than a screw with many threads close together.