A particle of mass m travels with constant velocity v along the straight line AB shown in the xy-plane. Compare its angular momentum about origin O at A and B.

Question

G1 Physics · Accepted Answer

Step 1: For uniform rectilinear motion p is constant and r(t)=r₀+vt. Step 2: Thus L=r×p=r₀×p because v×p=0; angular momentum about O stays constant. Final answer: A — Lₐ=Lᵦ.