Relative speed = 2 + 7 = 9 m/s closing. Time to close 130 m = 130/9 ≈ 14.44 s.
Segments: 0→1: ( |6-2| = 4 , \textm ) 1→3: ( |2-6| = 4 , \textm ) 3→4: ( |6-2| = 4 , \textm ) Total = ( 4+4+4 = 12 , \textm )
A particle moves with position ( s(t) = 2\sin(3t) ), ( t ) in seconds, ( s ) in meters. Find: rectilinear motion problems and solutions mathalino upd
Rectilinear motion is categorized by how acceleration behaves over time. 1. Constant Velocity (Uniform Motion) The particle moves with zero acceleration ( ), meaning its speed and direction do not change. 2. Constant Acceleration The velocity changes at a steady rate ( ). Final Velocity: Displacement: Velocity-Displacement: 3. Variable Acceleration
Solution:
| Quantity | Variable a(t) | Constant a | |----------|---------------|-------------| | v(t) | ∫ a dt + C | v₀ + a t | | s(t) | ∫ v dt + C | s₀ + v₀ t + ½ a t² | | v² relationship | Not directly | v² = v₀² + 2a(s-s₀) |
When acceleration is not constant, calculus becomes essential. You must use the fundamental relationships: Relative speed = 2 + 7 = 9 m/s closing
s=vi⋅t+12a⋅t2s equals v sub i center dot t plus one-half a center dot t squared
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h=12gt2=12(9.81)(52)=122.625 mh equals one-half g t squared equals one-half open paren 9.81 close paren open paren 5 squared close paren equals 122.625 m Key Problem Indices from MATHalino