From the edge of a roof top you toss a green ball upwards with initial velocity v₀ and a blue ball downwards with the same initial velocity. When they reach the ground below, A) the green ball will be moving faster than the blue ball. B) the blue ball will be moving faster than the green ball. C) the two balls will have the same speed.

Question

Quizplus · Accepted Answer

Assuming there is no air resistance, the two balls will have the same magnitude of velocity when they hit the ground. This is because the initial velocity of the blue ball is the same as the magnitude of the initial velocity of the green ball (since it's moving downwards), and both will fall for the same amount of time. Therefore, the correct answer is C, the two balls will have the same speed.

From the Edge of a Roof Top You Toss a Green