Mighty (simple) Machines
This Machine help move elevators up and down. It can also be found on Clothelines
What is a Pulley?
This Machine has Levers, Wheels and Axels, Screws and Wedges that help you get to school on snowy days
What is a car?
You throw a ball at a friend. Is that work?
Bonus: You throw the ball at your friend with 20N of force over a distance of 10m. What is the work done?
Yes!
Bonus: 200J
This is the force that opposes motion.
Bonus: What season are you most likely to encounter less of this force?
What is friction?
Bonus: Winter!
These are the key people in the school the school
Who are Mrs. Boylan, Mrs. Morrison, Mrs Pike, Miss Alyson, Mrs. Hagen
This Machine uses grooves in a Cylinder to work
What is a Screw?
This machine uses Levers, Wheel and Axel and screws to do its job. You'll certainly find them in the Netherlands, and in Canada during the summer months
What is a Bicycle?
You hold your binder to your chest as you go to your next class. Is this work?
No!
This is released when friction occurs, and a machine becomes less efficient
What is Heat?
Holy Cross was built in this year
:)
You can find this machine on a Bus (Hint: it's the name of a song that little kids sing)
What is the Wheel and Axel (Wheels on the Bus)
These machines both use a Lever and Wedge to complete their tasks. One might find them in a Horror Film.
What is a Shovel and Axe?
You try, without luck, to push a heavy block on a sheet of ice. Is work being done?
Bonus: What could be affecting your ability to move this block?
No!
Bonus: Lack of friction on the ice makes it really hard to move the box
True or False:
The lower the number for efficiency, the better a machine is at using energy
What is False?
The lower the number for effiency, the worse a machine is at using energy
How long has Mrs. Buck been at the school?
Bonus: What grade did she teach last year?
20 some years!!
Bonus: grade 4
These two machines are the same, just rotated 90 degrees
What is a Wedge and a Ramp/Incline Brain
This machine uses a Lever, Wheel and Axel and a Wedge to do its job. It's what lets you eat your precious Chef Boyardee
What is a can opener?
A ball you throw straight up into the air hovers for a moment before coming back down. At its peak, is there work being done on the ball?
Bonus: If you threw that ball into the air with a force of 85N, and you know the work done is 981J, how far did that ball travel (in meters)?
No! The ball is not moving when it gets to the top, despite being thrown up.
Bonus: 11.5m
A pulley setup has a Mechanical Advantage of 10 and a Speed ratio of 13.4. What is the Efficiency?
75%
This is the team name of the school
What are the hurricanes?
Daily Double!
How do you make the 3 classes of Levers?
2nd: Load in the middle, Fulcrum and Force on opposite ends.
3rd: Force in the middle, Fulcrum and load on opposite ends.
This Machine uses Screws, Levers and Wheel and axels to do its job. You're probably wishing you knew how to read it
What is a clock?
You're being driven to school in a car. Is work being done on you?
No, because you are not physically moving within the car.
Even if the car is moving, the object (you) are not actually moving with force.
A ramp system has a 56% efficiency and a 21 speed ratio. Calculate the mechanical advantage of this system
Mechanical advantage= 37.5
Holy Cross has this many grade 8 students
What is 50 students?