Question

A baseball is thrown off a building 320 feet high at an initial upward speed of 80 feet per second. How long does it take the baseball to reach its highest point?

A) 4.2 seconds
B) 4 seconds
C) 7.6 seconds
D) 2.5 seconds

Answer 1

Using the formula for the time to reach the highest point of a projectile's trajectory, we calculate that it takes 2.5 seconds for a baseball thrown upward at 80 ft/s to reach its highest point.

Step-by-step explanation:

The question is asking about the time it takes for a baseball that is thrown upwards to reach the highest point in its trajectory. The time to reach the highest point of a projectile can be found using the formula t = v0 / g, where v0 is the initial velocity and g is the acceleration due to gravity (approximately 32 feet per second squared on Earth). Plugging in the given values from the question:

t = 80 ft/s / 32 ft/s2 = 2.5 seconds

Therefore, the time it takes for the baseball to reach its highest point is 2.5 seconds, which corresponds to option D.