Simple Machines
Name the type of gear that we used to change the plane from horizontal to vertical. Idler, Spur, or Bevel?
Bevel
What is the definition of Mechanical Advantage?
How much a simple machine makes work easier by amplifying the force needed to do it.
Why do we need simple machines?
We need them to complete work we would not be able to do without our force being magnified.
Describe a gear or pulley system that you have seen.
Why is it used? Are there any mechanical advantages?
Answers will vary.
Give an example of a pulley.
ie) a flagpole
What gear is used in the middle of 2 gears and is used to change the direction of the rotation?
Idler, Spur or Bevel?
Idler
What is the definition of a compound machine?
A machine with more than 1 simple machine. ie) a bike has a wheel and axle AND gears
How do simple machines help us?
They help us complete work that would otherwise be too hard, take too long or near impossible. They allow us to not exert so much force and energy.
What simple machines do YOU use each day? Name 5.
Answers will vary. Possible answers may include:
Bike, faucet, door, stairs, car.
A lever can lift a heavier load by moving the fulcrum closer to which end? Load, Force, or Middle?
Load
What is is called when a Gear system uses 2 or more gears? Gear train, Gear Team, Gear Components or Gear Setup?
Gear Train.
What is a pulley?
A pulley is made of a rope fixed around a wheel that changes the direction of the force
What does multiplying a force mean?
It means that the input force we put into a machine is multiplied and made greater through the mechanical advantage of a machine.
A staircase is an example of what simple machine?
Inclined Plane
What is the function (purpose) of a pulley?
To change the direction of the force, make the force stronger and make the load lighter.
A knife is an example of what simple machine?
A Wedge
Give an example of a gear.
ie) a can opener
A bottle top if an example of what simple machine?
A Screw