1. The problem statement, all variables and given/known data When you toss a ball up and let it drop to the ground, compared to when you just let it fall, will the time it takes to reach the ground and impact velocity be equal? 2. Relevant equations 3. The attempt at a solution For the time, they shouldn't be equal, since the height from which the ball starts falling is different right? But how come when you solve projectile motion problems with an original velocity in the vertical direction, you don't need to calculate the separate two paths--one up and one down--separately, but you still get the same answer?