{Use of Tech} Decreasing velocity A projectile is fired upward, and its velocity in m/s is given by v(t) = 200e^−t/10, for t≥0.
a. Graph the velocity function, for t≥0.

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Understand the velocity function: The given function is v(t) = 200e^(-t/10), where v(t) represents the velocity of the projectile at time t. The function is an exponential decay function, indicating that the velocity decreases over time.

Identify the key features of the function: The initial velocity at t = 0 is v(0) = 200e^(0) = 200 m/s. As t increases, the term e^(-t/10) decreases, causing the velocity to decrease.

Determine the behavior of the function as t approaches infinity: As t becomes very large, e^(-t/10) approaches 0, which means the velocity v(t) approaches 0 m/s.

Choose an appropriate range for t: Since the problem specifies t ≥ 0, consider a range of t values from 0 to a reasonable upper limit, such as 50 seconds, to observe the behavior of the velocity over time.

Plot the graph: On a graph, plot v(t) on the y-axis and t on the x-axis. Start at the point (0, 200) and show the curve decreasing towards the x-axis as t increases, reflecting the exponential decay of the velocity.

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주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Exponential Functions

Exponential functions are mathematical expressions in the form of f(t) = a * e^(kt), where 'e' is the base of natural logarithms. In the context of the given velocity function v(t) = 200e^(-t/10), the negative exponent indicates that the function decreases over time, which is typical for projectile motion as it loses velocity due to gravity.

Graphing Functions

Graphing functions involves plotting points on a coordinate system to visualize the relationship between variables. For the velocity function v(t) = 200e^(-t/10), the graph will show how the velocity decreases as time increases, illustrating the projectile's deceleration. Understanding how to interpret and create these graphs is essential for analyzing motion.

Velocity and Time Relationship

The relationship between velocity and time in projectile motion describes how the speed of an object changes over time. In this case, the velocity function indicates that as time progresses, the velocity of the projectile decreases exponentially, reflecting the effects of gravitational pull. This concept is crucial for understanding the dynamics of motion in physics.

{Use of Tech} Decreasing velocity A projectile is fired upward, and its velocity in m/s is given by v(t) = 200e^−t/10, for t≥0.a. Graph the velocity function, for t≥0.