Mass Ratio from Kinetic Energy · PhysicsBowl 2021 #3
Physics · mechanics
Problem
A brick is moving at a speed of 3 m/s and a pebble is moving at a speed of 5 m/s. If both objects have the same kinetic energy, what is the ratio of the brick's mass to the pebble's mass?
A) 25:9 B) 5:3 C) 4:1 D) 3:1 E) 5:3