Resolution of Forces
|
Ranking
Rank the resultants from
smallest to
largest. |
Task
St. Mary's U. Astronomy and Physics Dept.
What crushed this can?
When the can is immersed in the water, the pressure inside the can is lower than the pressure outside
Review
Click on the button and play ...
| One of these things is not like the other! |
The idea for this game and graphic above come from a great high school physics teacher named Kelly O'Shea.
HaeLim (Emily) Wee , Class of 2017
Video Instruction
showmethephysics.com
Force on refrigerator acts in 2 directions
Force acts in 2 directions
H. Resolution of Forces - Breaking down a single vector into 2 or more vectors
 |
Show Me The Physics
Which component is responsible
for making this cart
move?
Only horizontal part (Fx)
of
applied force
If the angle were increased, how would it change the size of the:
Vertical component?
Increase
Horizontal component?
Decrease
Video Instruction
showmethephysics.com
Ex 1) A car is pulled with a force of 60. N at angle of 37° from the horizontal. Find the vertical and horizontal components of the applied force
Scale: 1 cm = 10 N
Using Trigonometry
| SinӨ = | Opp | = | Fy |
| Hyp | F |
Cross Multiply
| Fy = FsinӨ |
| Fx = FcosӨ |
"One size fits all"
Fy = 60. Nsin37°
Fy = 36 N Up
Fx = 60. Ncos37°
Fx = 48 N Right
Check a2 + b2 = c2
36 N2 + 48 N2= 60. N2
Ex 2) Weight of Cart = 80 N
Horizontal Component
of
Weight Force?
O N
Vertical Component
of Weight Force?
80. N
Horizontal Component
0 N
Vertical Component
80 N down
Ex 3) A 50. N force at an angle of 80° has its' angle changed to 10.°.
How will the vertical and horizontal components change?
Angle & Components - Flash
Show me The Physics Website
Vertical component - smaller
Horizontal component - larger
Ranking Task Rank the Vertical Components from least to greatest.
Explain your answers
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Ex 4) Parallel & perpendicular components
Show Me The Physics
F = 10. N (Weight)
F = 10. N (Weight)
Find the force holding cart on ramp and force that acts down
Force (down
ramp) = Fapplied
sinӨ =
5.0 N
Force (on ramp) = Fapplied cosӨ =
8.7 N
|
Ranking Task Rank the parallel
component
Rank the perpendicular
component |
Finding a horizontal component
Box on a Ramp
Show Me The Physics
YouTube Channel
**AP - Acceleration /Ramp**
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