Two particles are simultaneously projected from different points in a uniform gravitational field and both experience the same acceleration g⃗. Let initial relative position be r⃗₀ and relative velocity v⃗_r. Which statements are correct?
Select all that apply

Question

Two particles are simultaneously projected from different points in a uniform gravitational field and both experience the same acceleration g⃗. Let initial relative position be r⃗₀ and relative velocity v⃗_r. Which statements are correct?

Select all that apply

G1 Physics · Accepted Answer

Common acceleration cancels. Exact collision requires the relative straight line to pass through the origin and the motion to be directed toward it; r⃗₀·v⃗_r>0 means the separation is initially increasing along the collinear collision line, so no future collision.