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Sagot :
Sure, let's work through the details step-by-step.
A quadratic equation is often used to model the height of a projectile. Such an equation is typically written in the form:
[tex]\[ y = ax^2 + bx + c \][/tex]
Here, [tex]\(y\)[/tex] represents the height of the projectile at any time [tex]\(x\)[/tex]. Now let's analyze each term in this expression:
1. Term [tex]\(ax^2\)[/tex]:
- This term involves [tex]\(x\)[/tex] squared and typically represents the influence of acceleration on the projectile. In the context of projectile motion, this is usually due to gravity.
2. Term [tex]\(bx\)[/tex]:
- This term represents the linear component of the motion. It combines with time [tex]\(x\)[/tex] and often represents the initial velocity of the projectile in the context of projectile motion.
3. Constant term [tex]\(c\)[/tex]:
- This term does not involve [tex]\(x\)[/tex] and thus is independent of time.
To understand the constant term [tex]\(c\)[/tex] more specifically:
- When we input [tex]\(x = 0\)[/tex] into the quadratic equation (which corresponds to the initial time):
[tex]\[ y = a(0)^2 + b(0) + c \][/tex]
[tex]\[ y = c \][/tex]
- Therefore, [tex]\(c\)[/tex] represents the value of [tex]\(y\)[/tex] when [tex]\(x = 0\)[/tex]. In the context of projectile motion, this means that [tex]\(c\)[/tex] is the initial height of the projectile.
Now, let's analyze each of the given options:
1. The initial height of the projectile:
- This option is correct, as we have determined that the constant term [tex]\(c\)[/tex] in the quadratic equation represents the height of the projectile when [tex]\(x = 0\)[/tex], which is the initial height.
2. The initial velocity of the projectile:
- This is represented by the coefficient [tex]\(b\)[/tex] of the term [tex]\(bx\)[/tex].
3. The time at which the projectile hits the ground:
- This is not directly represented by any single term in the quadratic equation but can be found by solving the equation for when [tex]\(y = 0\)[/tex].
4. The maximum height of the projectile:
- This is found by analyzing the vertex of the parabola represented by the quadratic equation, not by the constant term.
Hence, the correct and always-represented-by-the-constant-term answer is:
The initial height of the projectile.
A quadratic equation is often used to model the height of a projectile. Such an equation is typically written in the form:
[tex]\[ y = ax^2 + bx + c \][/tex]
Here, [tex]\(y\)[/tex] represents the height of the projectile at any time [tex]\(x\)[/tex]. Now let's analyze each term in this expression:
1. Term [tex]\(ax^2\)[/tex]:
- This term involves [tex]\(x\)[/tex] squared and typically represents the influence of acceleration on the projectile. In the context of projectile motion, this is usually due to gravity.
2. Term [tex]\(bx\)[/tex]:
- This term represents the linear component of the motion. It combines with time [tex]\(x\)[/tex] and often represents the initial velocity of the projectile in the context of projectile motion.
3. Constant term [tex]\(c\)[/tex]:
- This term does not involve [tex]\(x\)[/tex] and thus is independent of time.
To understand the constant term [tex]\(c\)[/tex] more specifically:
- When we input [tex]\(x = 0\)[/tex] into the quadratic equation (which corresponds to the initial time):
[tex]\[ y = a(0)^2 + b(0) + c \][/tex]
[tex]\[ y = c \][/tex]
- Therefore, [tex]\(c\)[/tex] represents the value of [tex]\(y\)[/tex] when [tex]\(x = 0\)[/tex]. In the context of projectile motion, this means that [tex]\(c\)[/tex] is the initial height of the projectile.
Now, let's analyze each of the given options:
1. The initial height of the projectile:
- This option is correct, as we have determined that the constant term [tex]\(c\)[/tex] in the quadratic equation represents the height of the projectile when [tex]\(x = 0\)[/tex], which is the initial height.
2. The initial velocity of the projectile:
- This is represented by the coefficient [tex]\(b\)[/tex] of the term [tex]\(bx\)[/tex].
3. The time at which the projectile hits the ground:
- This is not directly represented by any single term in the quadratic equation but can be found by solving the equation for when [tex]\(y = 0\)[/tex].
4. The maximum height of the projectile:
- This is found by analyzing the vertex of the parabola represented by the quadratic equation, not by the constant term.
Hence, the correct and always-represented-by-the-constant-term answer is:
The initial height of the projectile.
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