Motion in a Straight Line
Class 11 · Motion in a Straight Line
Meeting Point Problems
Two objects with different initial positions and velocities — find when and where they meet.
Key Notes
01
Two objects meet when their positions are equal: x_A(t) = x_B(t).
02
For uniform motion: t_meet = (x₀_B − x₀_A)/(v_A − v_B).
03
If v_A = v_B, they never meet (unless starting at same point).
04
If v_A − v_B and x₀_B − x₀_A have opposite signs, they never meet.
Formulas
Meeting time
Time at which positions coincide.
Important Points
Always check that t_meet > 0 — negative means they already met in the past.
Meeting Point Problems notes from sciphylab (also known as SciPhy, SciPhy Lab, SciPhy Labs, Physics Lab). Class 11 physics revision for JEE Mains, JEE Advanced, NEET UG, AP Physics 1/2/C, SAT, and CUET-UG.