Date post: | 14-Jun-2015 |
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Technology |
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WORK and WORK and ENERGYENERGY
Working with ForcesFORMULAE
F = MA
W= mg
M = F/A
A = F/M
Constant:
Acceleration due to gravity
9.8 m/sec/sec
MATTERThe stuff that makes up all things is called matter.
Matter is defined as anything which:
takes up space and has mass.
Amount of substance in an object
Click on this link: http://www.youtube.com/watch?v=grWG_U4sgS8&feature=related
Weight Vs. Mass
Weight and Mass
Weight is a measure of the force of gravity on an object
Weight = Mass x acceleration due to gravity
w= mg
m
w
g
W = m x g
M = w /g
Mass kilogramsAcceleration m/sec/secforce newton (N)
1N = 1 kg x 1 m/sec/sec
Unit of Force
Work
Click on this link:
http://www.youtube.com/watch?v=IvcOYOO0Fvw&feature=related
WORKWORK
A force acting through a distance
Work = Force x Distance
FORCE
DISTANCE
Work = force x distance
W = F d
Work = F (N) x D (m)
= Newton-meter or joule (J)
WORKWORK
A force acting through a distance
Work = Force x Distance
FORCE
DISTANCE
Work = force x distance
W = F d
Work = F (N) x D (m)
= Newton-meter or joule (J)
Do you do more work going straight up a mountain or taking the longer scenic route around to the top?
AB
Work = Force (N) x D (m)
or W= Fd
“Kennon or Marcos Road?"
Title/Aim: Do you do more work going straight up a mountain or taking the longer scenic route around to the top?
Hypothesis
Variables
Procedure
Blank Tables
Table showing effect of Distance on Force
Distance D/m
Force of Car F/NWork
W= F x DTrial 1 Trial 2 Trial 3 Average
0.5
0.60.7
0.8
0.9
1.0
SUMMARY OF CONCEPTS:
•If h is doubled, the GPE is doubled.
If H is tripled, the GPE is also tripled.
•If speed (velocity) is doubled (2x), the Kinetic Energy increases (4x or 22).
If speed (velocity) is tripled (3X), the KE increases 9x or 32.
• The GPE at the top changes to KE at the bottom.
GPE = w x h or GPE = mgh