"Fun" Math
What is the mechanical efficiency of a machine whose work input is 100 joules and work output 30 joules?
What is 3?
True or False:
There are four types of levers.
What is false
How is work measured?
What is joules
What is the unit for power?
What is watts
What is a machine?
What is something that makes work easier?
Using a force of 10 newtons, you push a shopping cart 10 meters. How much work did you do?
What is 100 joules.
A machine made up of 2 or more types of simple machines
What is a compound machine?
How do you calculate work?
What is force times distance
True or False?
Is power calculated by work done over time?
What is true
True or False:
Work input is the work done by a machine.
What is false?
A lever allows 35 newton load to be lifted with a force of 7 newtons. What is the mechanical advantage of the lever?
What is 5?
A pair of inclined planes that move
What is wedge?
What is work?
What is when a force causes an object to move in the direction of that force
What is power?
What is the rate at which work is done or energy is transferred
A number that tells how many times a machine multiplies force
What is mechanical advantage?
A ramp is .5 meters high and has a slope 4 meters long. What is the mechanical advantage?
What is 8
Give an example of a wheel and axle machine
What is
1)doorknob
2)faucet
3)steering wheel
What is more work: pushing a car up a hill or using a cable?
What is they are equal
What does Watts stand for?
What is joules per second?
True or False:
A machine can be 100% efficient
What is false?
The radius of a wheel of a wheel and axle is 4 4times the radius of the axle. What is the mechanical advantage of the wheel and axle?
What is 4
List 2 kinds of pulleys
What is
1) fixed pulley
2)movable pulley
3)block and tackle
What are the three requirements for work?
What is
1)energy is always transferred
2)work requires movement
3)force and movement must be in the same direction
Is sanding by machine instead of hand a way to increase power?
What is yes?
How do you calculate mechanical efficiency?
What is Work output divided by work input times 100.