Disregarding air drag,how fast must you toss a ball straight up in order for it to take 2 seconds to return to the level from which you tossed it?
A)5 m/s
B)7)5 m/s
C)10 m/s
D)15 m/s
E)20 m/s

Question

Quizplus · Accepted Answer

The time it takes for an object to travel to its peak and back down to its starting point is given by the equation t = 2(v/g), where t is the time of flight, v is the initial velocity, and g is the acceleration due to gravity. Plugging in t = 2 seconds and g = 9.8 m/s^2, we get v = gt/2 = 10 m/s. Therefore, the answer is (C) 10 m/s.

Disregarding Air Drag,how Fast Must You Toss a Ball Straight