Chapter 6
Fill in the blank
The U.S Standard of Measurement uses ____, feet, and inches for distance and ______, pounds for weight
Yards, ounces
Anything we use in order to use force in a convenient way is called _____
Machine
Gears that use a belt to help do work is called ______
Pulley
What is potential energy
energy that is stored
Force x Distance
An inclined plane that allows you to use less effort is called ______
Ramp
Winch combines an axle with a lever in order to lift heavy objects with less effort
True or False
Energy cannot disappear
True, it can only change forms
The formula for Power is __________
Work (Force x Distance) / Time
The nutcracker is a type of what lever?
Second class lever
How are pulleys like gears?
They rotate; give us mechanical advantage
kinetic
If you pushed a car with 72 kg of force, and it went 6 meters far, how much work did you produce.
432 newton - meters
Name an example of both a first class and third class lever.
First class: Pliers, scissors, crowbar
Third class: Tweezers, tongs
Whats the difference between a worm gear and a regular gear?
A worm gear spins perpendicular and can be very small. used to slow down motors.
This law says that energy can never be destroyed
law of conservation
Jacobs Tesla weighs 5.6 kg (55 newtons) and goes 5 meters in 10 seconds. What is its power?
Use correct units
27.5 newton - meters/second
Name the 3 parts of a lever
Resistance arm, Effort arm and the Fulcrum
Whats the difference between a fixed pulley and a moveable pulley?
hint: it involves work
Moveable pulleys help lift things much easier with less work, but requires more distance
Name four of the 6 energy's
Mechanical, Heat, Electrical, Light, Chemical, Atomic