It is given in the question that
A projectile is fired at 657 mi/hr. how fast is that in meters per second? use the conversion factor 1 mile = 1610 m.
So we need to convert miles per hour to meters per second.
And it is given that 1 mile equals to 1610 meters and 1 hour equal to 3600 seconds.
So we will get
Step-by-step explanation:
Given that,
The quadratic equation that models the ball's height above the ground h, t seconds after it was thrown is given by :
...(1)
(a) For maximum height, put dh/dt = 0
So,
Put the value of t in equation (1).
So,
(b) When the ball reaches the ground,
h = 0
So,
So, the ball hits the ground in 7 seconds.