terms
simple machines
A simple device for changing the amount and/or direction of the force you need to use to move an object
Define wedge/ how does it work
two inclined planes put together that drives in between two objects seperating them.
What is an example of a frst class lever?
A seesaw
What is an example of a pulley?
a crane
How many simple machines are there? (ten seconds to answer)
6
what is a Lever / how does it work
A simple machine that pivots on a bar and a fixed fulcrum. You apply force on one side and it results in a force pushing up on the opposite end.
describe a screw
A spiraly grooved solid cylindar, an inclined plane wrapped around a cylindar.
What is an example of a second class lever?
A wheelbarrow
WHat is an example of a wheel and axle?
A steering wheel.
Name all of the simple machines. (15 seconds to answer)
screw, wedge, ramp, inclined plane, pulley, wheel and axle.
Define Wheel and Axle/how does it work
A wheel is attached to an axle that rotates together letting it transfer a force from one to the other.
descirbe a 1rst class lever
where the fulcrom is placed inbetween the load and the effort
What is an example of a third class lever?
A baseball bat
Whats a siuation that you might need an inclined plane.
When you need to get an object to a higher place and have to increase the distance to lessen the force.
WHat is work?
When a force is applied to an object and it moves int hat same direction.
Define pulley / how does it work
A pulled rope over a wheel that changes the direction of force.
describe a second class lever
The load is placed between the fulcrom and the effort.
What is an example of an inclined plane?
ladder, ramp
Whats an example that you might need to use a wedge?
When you need to cook dinner and cut the potatoes open.
What is power?
The amount of work you can do in a certian amount of time.
Define an inclined plane/how does it work
A flat surface raised at an angle that is used to lift a heavy load.
describe a third class lever
The effort is placed between the fulcrom and load.
what is an example of a wedge?
A kitchen knife
WHen might you use a third class lever?
When playing baseball or softball.
What is acceleration?
acceleration= velocity / time rate of change of velocity