Two identical carts roll on a friction-free horizontal surface
PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials
Problem
Two identical carts roll on a friction-free horizontal surface. Cart A moves due north with speed v, and Cart B moves due east with the same speed v. Which of the following best describes the direction of the total linear momentum of the two-cart system at that instant?
(a) Due north
(b) Northwest, 45∘ north of west
(c) Northeast, 45∘ north of east
(d) Northeast, 26∘ north of east