Show:
Machines, Force & Advantage
Inclined Plane/Screw
Wheel & Axle
Pulley
Wedge/Lever
100
Something that makes work easier or changes the direction/motion of an object.
What is a machine.
100
Description of an inclined plane.
What is a flat, sloped surface.
100
This part of the simple machine is the smaller cylinder.
What is the axle?
100
Description of a pulley.
What is a grooved wheel with a rope/cable wrapped around it.
100
The two ways that levers make work easier.
What is increase the output force or increase the distance an object will travel.
200
Pushing down on a shovel, or hitting the top of a nail are examples of this.
What is input force.
200
The description of a screw.
What is an inclined plane wrapped around a cylinder.
200
Description for a wheel and axle.
What is two circular or cylindrical objects that are fastened together and rotate around a common axis. Two round things put together that both spin with each other.
200
What is the mechanical advantage of a fixed pulley.
Trick question - fixed pulleys do not give a mechanical advantage.
200
Description for a wedge. Why does a golf club wedge fit this description?
Device with one thick end that gets smaller/thinner and comes to a point at the other end. The golf club has an edge on one side. It helps to dig into and slice through the ground.
300
A 95mph pitch hits the catcher's glove with 100 Newtons worth of force. The force of the ball after it left the pitcher's hand is the ____________.
What is output force?
300
Why is a winding road an example of a screw?
What is because it is like a twisted inclined plane. Like the Archimedes Screw, it allows something to travel up with less force.
300
Name two examples of a wheel and axle that work to increase output force by turning the "wheel"
What are: a screwdriver, a doorknob, a steering wheel, a faucet.
300
What is the benefit of using a fixed pulley - or - how does a fixed pulley fit the definition of a machine.
What is the fixed pulley changes the direction of your force.
300
What is the point around which a lever rotates?
What is the fulcrum.
400
Mechanical Advantage is the Output Force divided by the Input Force. If the mechanical advantage is 1, what does that mean?
What is - there is no mechanical advantage. You just get out what you put in.
400
Name 4 examples of an inclined plane.
What are, a hill, a ramp, stairs, a slide. Other answers will be considered.
400
Turning the axle of a wheel and axle requires more input force. Why would you want to use more force to get less force as a result?
You get less force, but the distance the object travels increases.
400
Name three examples of a pulley that you can find in the school.
What are an elevator, a flagpole, and the shades.
400
Which type of lever is a fishing pole? Which type of lever is a see-saw?
Fishing pole - lever that increases the distance an object will travel. See-saw - a lever that increases output force.
500
These are the three ways that machines can make work easier. What do you sacrifice when you gain advantage from machines?
What is changing force - sacrifice is moving a longer distance. What is increasing distance traveled - sacrifice is using more force. What is changing direction - no mechanical advantage.
500
What is an Archimedes Screw and how does it work?
What is a screw used for irrigation by the Ancient Egyptians. When turned, water travels up the spiral "inclined plane" and gets trapped at each new level, eventually spilling out at a higher point.
500
Why is a thin wheel able to roll better than a thick wheel of the same diameter?
Wheels that come in contact with the ground have friction. The thicker the wheel is, the more friction.
500
A block and tackle is an example of a pulley that increases output force. Why does this pulley increase output force?
The block and tackle puts more than one pulley together and that makes the rope travel a greater distance. Spreading force over a greater distance = more output!
500
A wedge is a version of an inclined plane. How many other simple machines increase the output force BECAUSE the force is spread over a distance.
Inclined plane - more distance, less input more output. Screw - more distance because of wrapped/spiral inclined plane. Lever - more distance from the fulcrum = more output Wheel and axle - turn the wheel, it's bigger so you have to turn it further = more output force on the axle Pulley - more pulleys = rope travels farther = more output force