Vocabulary
Concepts
Units
Math
Machines
100
___ is the transfer of energy through motion.
Work
100
A winding mountain road is an example of what kind of simple machine?
Inclined plane
100
What is the unit for power?
Watt
100
An object weighing 200 N was lifted .5 m. How much work was done?
100 J
100
Name the 6 simple machines
Screw, lever, inclined plane, pulley, wheel and axil, and wedge
200
What is it called when more than one simple machine works together?
Compound machine
200
At what point in the swing of the wrecking ball should the ball make contact with the wall to make a collision with the greatest kinetic energy?
3
200
What is the unit for work?
Joule
200
If x=3cm and y=15cm, what is the IMA of the simple machine?
5
200
What class of lever is shown?
2nd class
300
A device that changes the amount of force is called a _______________ ?
A simple machine
300
The cart is traveling from left to right along a frictionless surface with an initial speed of 3 m/s. At which point is the gravitational potential energy of the cart the least?
B
300
What is the formula for IMA?
Effort (input) / Resistance (output)
300
In the human forearm as a lever, the elbow serves as the fulcrum. The effort force is provided by the bicep muscle that attaches 5 cm from the elbow. The resistance force is in the palm of the hand, 25 cm from the elbow. What is the AMA of the forearm?
5
300
What class of lever is shown?
3rd class lever
400
This type of pulley is made up of both fixed and movable pulleys
Pulley system
400
The diagram below shows a board on top of two bricks with a cylinder on top of the board. The board exerts an upward force of 50 N. Which best explains this situation?
The cylinder has a weight of 50N
400
What is the formula for AMA?
Resistance (output) / effort (input)
400
A boy exerted a force of 70 N on a box, moving it 25 m in 10 s. What power was used?
175 W
400
Distance between the output force and fulcrum is called the _________________ ?
Output arm
500
___ is the rate of doing work.
Power
500
The number of times the machine increases an input force to assist you is called the _________________ ?
Mechanical Advantage
500
What is the conversion for calories to Joules?
1 calorie = 4.184 Joules
500
Which cart shown has the greatest kinetic energy _____________ ?
2
500
What are the 3 things machines do to make work easier?
1) Increase force
2) Increase distance
3) Change direction of the force