MA and Efficiency
1
April 29, 2014
Objective: What is mechanical advantage?
DO NOW
Copy down today's objective on page 68 in your notebook. Also, make sure you have a red textbook at your desk.
Happy Tuesday!
Objective: What is mechanical advantage?
Tonight's HW
Finish How Machines Do Work packet. Use pages 5259 in red textbook for help.
Open notebook quiz next Tuesday on notes from last Tuesday, Wednesday and today.
MA and Efficiency
2
April 29, 2014
RSFOTDDogs don't get frostbite when they play in the snow because the blood vessels in their paws are arranged in such a way to keep their body heat from escaping.
Best Answer of the Week Stanley Zhen
There shouldn't be stars right next to the moon because the moon would cover the stars.
MA and Efficiency
3
April 29, 2014
Mechanical Advantage = how much faster and easier
a machine makes your work.
Friction = When two objects rub against each other.
Efficiency = How easily a machine does work.
The less friction, the more efficient a machine is.
Mechanical Advantage and Efficiency
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Objective: What is mechanical advantage?
MA and Efficiency
4
April 29, 2014
Which is more efficient?
In all machines, some work is wasted due to friction,
so no machine is 100% efficient.
Ideal Machine = 100% efficient (this doesn't exist)
