Work
Wheel and Axle, Pulley, Screw
Wedge, Inclined plane,
Simple Machines
Levers
100
How do we calculate work?
work=force x distance
100
A flagpole is an example of a......
pulley
100
True or False: A pizza cutter is a pulley
False
100
What is the output force in our body?
The work that we do
100
Is a hammer a lever?
Yes
200
Pushing a car that is stuck in snow is an example of....
work without motion
200
What is a screw?
A screw is an inclined plane wrapped around a cylinder.
200
True or False: A ramp is an inclined plane
true
200
What is the input force in our body?
Our bones and muscles
200
In the body, what acts as a fulcrum?
Your joints
300
What is work?
When you apply a force on an object and the object moves a distance.
300
What is a pulley?
A pulley is made up of a grooved wheel with a rope or cable wrapped around it.
300
What is a wedge?
A device that is thick at one end and thin on the other end.
300
What do all of the machines have in common?
They make work easier.
300
What is a lever?
A rigid bar that is free to pivot on a fixed point
400
How do we know when work is done?
You know when work is done when the object moves in the same direction in which the force is applied.
400
What is a wheel and axle?
A wheel and axle is made of 2 circular or cylindrical objects fastened together that rotates around a common axis.
400
What is an inclined plane?
A flat sloped surface
400
How is a lever a simple machine in the body?
You had to have one of these: The joint in your neck, The ball of your foot, your elbow.
400
Most of the machines in the body consists of....
Levers
500
What is work?
When you apply a force on an object and the object moves a distance.
500
What simple machines in this category are in a c-clamp?
Screw and Wheel and axle
500
Why is a knife a wedge?
A knife is a wedge because it is thick on one side, and tapers to a thin edge on the other side.
500
What do machines do?
Make work easier. Change the amount of force you exert or the distance over which you exert the force.
500
What is fulcrum?
The fixed point that a lever pivots around
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