Work
SI Unit for Work?
What is Joule
SI Unit for Power
What is Watt
A machine made of more than 1 simple machine
What is compound machine
A device that makes doing work easier
What is simple machine
Seesaw
What is a first class lever
Formula for Work?
What is W = Force x Distance
Formula for Power
What is P = W/T
Fulcrum in the middle
What is first class lever
A bar that is free to pivot about a fixed point
What is a lever
Changes direction of force
What is first class lever
Transfer of energy through motion
What is work
Rate at which work is done
What is Power
A combination of fixed and movable pulley's
What is block and tackle
grooved wheel with a rope or chain running along the grove
What is a pulley
bat
What is a third class lever
Force exerted through a distance
What is work
How much power is used to do 375 J of work in 15 seconds?
What is P = 25W
machine, contraption, invention, device, or apparatus is a deliberately over-engineered or overdone machine that performs a very simple task in a very complex fashion, usually including a chain reaction.
Who is Rube Golberg
combination of fixed and movable pulleys
What is block and tackle
output or resistance is in the middle
Second class lever
Brett's backpack weighs 30 N. How much work is done on the backpack when he lifts it 1.5 m from the floor to his back?
W = 45 J
25 W of power is used to do 450 J of work. How long did it take to do the work?
What is T = 18s
the percentage of in the input work that is converted to output work
Efficiency
ex. Axe, knife
What is a wedge
ex. Wheelbarrow
What is second class lever