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Bumagsak na Paggalaw: UAM at Free Fall
Sep 19, 2024
Lecture Notes: Vertical Motion at Free Fall
UAM Equations sa Vertical Motion
Apat na UAM equations ang ginagamit.
Kasalukuyang nasa vertical motion patayo (pataas/pabababa).
Gumamit din ng y-axis para sa mga equations:
Halimbawa: Y, Y, Y sa bawat equation.
Konsepto ng Free Fall
Free Fall:
Lahat ng bagay na bumabagsak ay nasa sole influence ng gravity.
Gravity:
Ang tanging pwersang nakaka-apekto sa free fall.
Acceleration due to gravity ay -9.81 m/s² (minsan -9.8 m/s² for simplicity).
Air Resistance:
Dapat ay walang air resistance sa free fall.
Mga Uri ng Free Fall
Diretsong Bumabagsak:
Isang bagay na binagsak mula sa taas.
Initial velocity (VI) = 0 m/s.
Hinagis Pataas:
Isang bagay na hinagis pataas at bumalik sa kamay.
Mga Dapat I-consider sa Free Fall
Initial Velocity (VI) ay laging 0 m/s kapag binagsak mula sa taas.
Acceleration due to gravity (A_Y) ay laging -9.81 m/s².
May tatlong variables na maaring hanapin:
Displacement (D_Y)
Time (T)
Final Velocity (V_FY)
Example Problems
Example 1: Paghanap ng Displacement
Problem:
Batu ang binagsak mula sa building, bumagsak after 5 seconds.
Given:
Time (T) = 5 seconds
VI = 0 m/s
A_Y = -9.8 m/s²
Equation Used:
D_Y = VI_Y * T + 1/2 * A_Y * T²
Solution Steps:
Calculate using given values.
Output: -122.5 meters (Negative indicates direction).
Example 2: Paghanap ng Time
Problem:
Building height is 122.5m, find how long rock takes to hit the ground.
Given:
D_Y = -122.5 meters
VI = 0 m/s
A_Y = -9.8 m/s²
Equation Used:
Same equation as Example 1, just solve for T.
Solution Steps:
Algebraic manipulation to solve for T.
Output: 5 seconds
Example 3: Paghanap ng Final Velocity
Problem:
Final velocity before hitting the ground after 5 seconds.
Given:
Time (T) = 5 seconds
VI = 0 m/s
A_Y = -9.8 m/s²
Equation Used:
V_FY = VI_Y + A_Y * T
Solution Steps:
Calculate using given values.
Output: -49 m/s (Negative indicates downward direction).
Example 4: Paghanap ng Final Velocity from Height
Problem:
Building height is 122.5m, find final velocity before hitting the ground.
Given:
D_Y = -122.5 meters
VI = 0 m/s
A_Y = -9.8 m/s²
Equation Used:
V_FY² = VI_Y² + 2 * A_Y * D_Y
Solution Steps:
Algebraic manipulation to solve for V_FY.
Output: -49 m/s (Negative due to downward direction).
Conclusion
Ginamit ang same equations para sa iba't ibang scenarios.
Importante na maunawaan ang konsepto ng direction (negative sign) sa displacement at velocity.
Ang bawat equation ay may tiyak na gamit depende sa hinahanap na variable.
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