Setting the Velocity to Zero

Oct 13, 2025 by wbrum.org 0 views

Understanding the Problem

Motion of a Soccer Ball The motion of a soccer ball can be described using the equations of motion. In this problem, we are given the height of the ball as a function of time, which is represented by the equation $$h(t) = -16t^2 + 32t$$. This equation describes the height of the ball at any given time $t$ .

Finding the Time Interval

To find when the soccer ball is moving through the air, we need to determine the time interval during which the ball is not at its maximum height. The maximum height of the ball occurs when the velocity of the ball is zero.

Velocity of the Ball

The velocity of the ball can be found by taking the derivative of the height function with respect to time. This gives us the velocity function $$v(t) = -32t + 32$$.

Setting the Velocity to Zero

To find the time at which the ball reaches its maximum height, we set the velocity function equal to zero and solve for $t$ . This gives us the equation $$-32t + 32 = 0$$. Solving for $t$ , we get $$t = 1 , \text{s}$$.

Time Interval

The soccer ball is moving through the air when it is not at its maximum height. This occurs when the time is greater than zero and less than the time at which the ball reaches its maximum height. Therefore, the time interval during which the ball is moving through the air is $$0 < t < 1 , \text{s}$$.

Conclusion

In conclusion, the soccer ball is moving through the air when the time is greater than zero and less than one second. This is because the ball is not at its maximum height during this time interval, and it is therefore in motion.

Mathematical Derivation

Step 1: Define the Height Function

The height of the ball as a function of time is given by $$h(t) = -16t^2 + 32t$$.

Step 2: Find the Velocity Function

The velocity of the ball can be found by taking the derivative of the height function with respect to time. This gives us the velocity function $$v(t) = -32t + 32$$.

Step 3: Set the Velocity to Zero

Step 4: Determine the Time Interval

Final Answer

The final answer is $\boxed{0 < t < 1 \, \text{s}}$ .

Understanding the Problem

Finding the Time Interval

Velocity of the Ball

The velocity of the ball can be found by taking the derivative of the height function with respect to time. This gives us the velocity function $$v(t) = -32t + 32$$.

Setting the Velocity to Zero

Time Interval

Conclusion

Mathematical Derivation

Step 1: Define the Height Function

The height of the ball as a function of time is given by $$h(t) = -16t^2 + 32t$$.

Step 2: Find the Velocity Function

The velocity of the ball can be found by taking the derivative of the height function with respect to time. This gives us the velocity function $$v(t) = -32t + 32$$.

Step 3: Set the Velocity to Zero

Step 4: Determine the Time Interval

Q&A

Q: What is the initial velocity of the soccer ball?

A: The initial velocity of the soccer ball is $$32 , \text{ft/s}$$.

Q: What is the height of the ball as a function of time?

A: The height of the ball as a function of time is given by $$h(t) = -16t^2 + 32t$$.

Q: When is the soccer ball moving through the air?

A: The soccer ball is moving through the air when the time is greater than zero and less than one second, i.e., $$0 < t < 1 , \text{s}$$.

Q: What is the velocity function of the ball?

A: The velocity function of the ball is $$v(t) = -32t + 32$$.

Q: When does the ball reach its maximum height?

A: The ball reaches its maximum height at $$t = 1 , \text{s}$$.

Q: What is the time interval during which the ball is moving through the air?

A: The time interval during which the ball is moving through the air is $$0 < t < 1 , \text{s}$$.

Final Answer

The final answer is $\boxed{0 < t < 1 \, \text{s}}$ .