Westonci.ca connects you with experts who provide insightful answers to your questions. Join us today and start learning! Join our platform to connect with experts ready to provide precise answers to your questions in different areas. Get detailed and accurate answers to your questions from a dedicated community of experts on our Q&A platform.

The equation for a projectile's height versus time is [tex]h(t) = -16t^2 + v_0 t + h_0[/tex].

A tennis ball machine serves a ball vertically into the air from a height of 2 feet, with an initial speed of 110 feet per second. What is the maximum height, in feet, the ball will attain?

Round to the nearest hundredth.

Answer here:


Sagot :

To determine the maximum height reached by the ball, we start with the given initial conditions and the equation for height as a function of time:
[tex]\[ h(t) = -16t^2 + v_0 t + h_0 \][/tex]
where [tex]\( v_0 = 110 \)[/tex] feet per second (initial velocity) and [tex]\( h_0 = 2 \)[/tex] feet (initial height).

To find the maximum height, we need to determine the time when the ball reaches its maximum height. This occurs when the velocity [tex]\( v(t) \)[/tex] is zero. The velocity function can be obtained by differentiating the height function with respect to time:
[tex]\[ v(t) = \frac{d}{dt}[-16t^2 + 110t + 2] = -32t + 110 \][/tex]

Set [tex]\( v(t) = 0 \)[/tex] to find the time [tex]\( t \)[/tex] at which the maximum height is reached:
[tex]\[ -32t + 110 = 0 \][/tex]
[tex]\[ 32t = 110 \][/tex]
[tex]\[ t = \frac{110}{32} \][/tex]
[tex]\[ t = 3.4375 \, \text{seconds} \][/tex]

Now, plug the time [tex]\( t = 3.4375 \)[/tex] back into the height equation to find the maximum height:
[tex]\[ h(3.4375) = -16(3.4375)^2 + 110(3.4375) + 2 \][/tex]
[tex]\[ h(3.4375) = -16(11.8164) + 377.125 + 2 \][/tex]
[tex]\[ h(3.4375) = -189.0625 + 377.125 + 2 \][/tex]
[tex]\[ h(3.4375) = 190.0625 \, \text{feet} \][/tex]

Rounded to the nearest hundredth, the maximum height the ball will attain is:
[tex]\[ 191.06 \, \text{feet} \][/tex]

Therefore, the maximum height the ball will attain is [tex]\( \boxed{191.06} \, \text{feet} \)[/tex].