The distance covered by a free-falling object in T seconds after its dropped is
D = (1/2) x (gravity acceleration) x (T²)
Gravity acceleration on Earth is 9.8 m/s². or 32.2 feet/sec².
20-ft = (1/2) (16.1) (T²)
20 = 8.05 T²
T = √(20/8.05) = 1.576 seconds.
No. I screwed up. 20 = (1/2)(32.2)(T-sqrd). / / / 20 = 16.1 T-sqrd. T= sqrt of (20/16.1) = 1.115 seconds. Forgive me.
could you please help with a problem, Jon takes a stone and tosses it straight up with a velocity of 30 feet per second. how long will it take this stone to hit the water?