Machines
MA -- IMA
Simple Machines
Simple Machines 2
Anything Goes
100
A device that does work with only 1 movement.
What is a simple machine?
100
The number of times a machine multiplies the effort force.
What is mechanical advantage?
100
A grooved wheel with a rope or chain running through the groove.
What is a pulley?
100
A sloping surface used to raise objects.
What is an inclined plane?
100
The measure of how well a machine operates.
What is efficiency?
200
A machine made up of two or more simple machines.
What is a compound machine?
200
What is the mechanical advantage of a single movable pulley?
2
200
A simple machine consisting of two wheels of different sizes that rotate together.
What is a wheel and axle?
200
An inclined plane wrapped in a spiral around a cylindrical post.
What is a screw?
200
What is a bar that is free to pivot about a fixed point?
Lever
300
The unit of power is a __________.
Watt
300
How do you calculate the mechanical advantage of a block and tackle pulley system?
Count the number of ropes supporting or raising the object.
300
A wheel with teeth along its circumference.
What is a gear?
300
An inclined plane with two or more sloping sides.
What is a wedge?
300
The rate at which work is done.
What is Power?
400
An imaginary frictionless machine is called a(n) _________________________.
ideal machine
400
If a lever has an effort arm of 9 meters and a resistance arm of 3 meters, what is the ideal mechanical advantage of the lever?
IMA = 3
400
A lever with a mechanical advantage greater than one is used to increase ______________.
force
400
Which 2 simple machines represent variations of a lever?
pulley, wheel and axle
400
______________ is transfered to an object when work is done.
Energy
500
The output work of a machine compared to the input is the ________________ of the machine.
efficiency.
500
A machine that changes only the direction of a force has a mechanical advantage of __________.
1
500
Choose the simple machine that DOES NOT belong with the group. Pulley, wedge, lever, wheel and axle
wedge
500
Name two simple machines that are part of a bicycle:
wheel and axle, gear
500
Which of the following CAN NOT be done by a simple machine? A) change the direction of a force B) transfer energy from one location to another C) increase the amount of work done D) decrease the time it takes to do work
C) increase the amount of work done
M
e
n
u