This is a machine consisting of two turning objects attached at the center - one causes the other to turn.
What is a wheel and axle?
100
Examples of this lever are a hammer (hammering a nail) and a tennis raquet.
What is a THIRD CLASS lever?
100
This combination of pulleys would give a mechanical advantage of 8.
What is X-fixed pulleys and 3-moveable pulleys?
100
This is the work when 40N pushes a load 50 m.
What is 2000 J?
100
A car is given 1000J worth of gasoline for energy, so this is the efficiency at making noise if 450 J go into noise-making.
What is 45%?
200
This is the mechanical advantage of a first class lever with effort arm of 95 cm and load arm of 19 cm.
What is 5?
200
This can be identified because the load is always in the middle of the lever.
What is a SECOND CLASS lever?
200
This is the speed ratio when a cyclist has the driver gear with 40 teeth and the follower gear with 10 teeth?
What is 4?
200
These are 2 values both measured using joules.
What are work and energy?
200
This is the pressure for a 600N horse standing on a 30 square-meter platform.
What is 50 pascals (Pa)?
300
This is the number of teeth on the follower gear of a wheel and pinion system when the speed ratio is 7 and the driver has 105 teeth.
What is 15?
300
This is one option of how to successfully teeter-totter with a big dude like Mr. O.
What is move him closer to the fulcrum?
OR
What is extend yourself further from the fulcrum?
300
Using one fixed and four moveable pulleys (2 ropes total on each), a 200 N pulling force can lift this load.
What is 3200 N?
300
If 5100J of work are performed using a pull of 30N, this is the distance the load moves.
What is 170m?
300
If the lights in our class are only 30% efficient at making light, this is the number of joules being wasted if 500 J of total electricity are given to the lights.
What is 350J?
400
SEE THE $400 PICTURE
What is 21 450 J?
400
This is one option of how to successfully lift extremely heavy things in a wheel barrow.
What is move the load forwards in the bucket - near the wheel?
OR
What is extend the handles to be very long?
400
The driver gear of a wheel-and-pinion system is rotating clockwise, then the second gear beside it is rotating this direction.
What is counterclockwise?
400
When the rise of the ramp is 3 m and the run is 4m, this is the work when 100 N pulls a load up the slope.
What is 500 J?
400
This is the pressure (to the nearest TENTH) when a 800 N rhino stands on a rectangular platform that is 5m by 7 m.
What is 22.9 Pa?
500
This is the efficiency of motion (rounded to the nearest whole number) of a jet pack we made - the energy given to the jet pack is 1 500 000 J, where 650 000 J are used for motion.
What is 43%?
500
These are possible measurements for a second class lever's effort and load arms that would give a mechanical advantage of 5.
What is EA = 20 and LA = 4?
OR
15/3, 10/2, etc.
500
This combination of pulleys - with multiple ropes - could give a mechanical advantage where a pull of only 50 N could lift 500 N worth of load.
What is a moveable pulley with 5 ropes in and out (any number of fixed)?
500
This is the run (rounded to the nearest TENTH) of the ramp if 480 J of work are used when a 60N force pulls a load along the slope of a ramp with rise of 6 m.
What is 5.3 m?
500
This is the side length of the square platform that a 3200N elephant is standing on if he exerts 200 Pa on the platform.