Show:
Work Energy and Power
Formulas
Units
Machines
Machines
Continued
100
the use of force to move an object some distance in the direction of the force
What is work?
100
Force x Distance
What is work?
100
the units for force
What is newtons?
100
any device that helps people do work by changing the way work is done.
What is a machine?
100
A plane that splits an object
What is a wedge?
200
the ability to do work
What is energy?
200
energy/time
What is power?
200
the units for Work
What is Joules?
200
the number of times the machine multiplies the input force
What is mechanical advantage?
200
A slanted surface used to raise an object
What is an incline plane?
300
the rate at which work is done
What is power?
300
1/2 x mass x speed squared or 1/2mv^2
What is kinetic energy?
300
The units for power
What is watts?
300
a comparison of a machine's work output with the work input
What is Mechanical Efficiency?
300
An escalator
What is an inclined plane?
400
the energy of motion
What is Kinetic energy?
400
mass x acceleration due to earth's gravity x height from the ground in meters or mgh
What is gravitational potential energy?
400
Both potential and Kinetic Energy are expressed in this unit
What is Joules
400
A bar that pivots about a fixed point
What is a lever?
400
the top of a soda bottle
What is a screw
500
the energy possessed by an object due to its motion and position
What is Mechanical Energy?
500
Kinetic Energy + Potential Energy
What is mechanical energy?
500
How much work is required to move a 50N block 8 meters?
What is 400J
500
The fixed point on which a lever rotates
What is a fulcrum?
500
a tool that does work with only one movement
What is a simple machine?