Two smooth blocks of masses and slide towards each other with speeds and respectively…
PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials
Problem
Two smooth blocks of masses 1kg and 2kg slide towards each other with speeds 2m s−1 and 1m s−1 respectively on a friction-free horizontal surface. They collide head-on and stick together. Which one of the following quantities is certainly conserved during the impact?
(a) Only kinetic energy
(b) Neither linear momentum nor kinetic energy
(c) Only linear momentum
(d) Both linear momentum and kinetic energy