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Sagot :
Certainly! Let's solve this step-by-step.
1. Start with the given formulas:
- The braking distance [tex]\( D(v) \)[/tex] is given by:
[tex]\[ D(v) = \frac{v^2}{26} \][/tex]
- The car's velocity [tex]\( B(t) \)[/tex] at time [tex]\( t \)[/tex] seconds is given by:
[tex]\[ B(t) = 3t \][/tex]
2. We need to find the braking distance [tex]\( S(t) \)[/tex] as a function of time [tex]\( t \)[/tex]. To do this, we will substitute the velocity function [tex]\( B(t) \)[/tex] into the braking distance function [tex]\( D(v) \)[/tex].
3. Substitute [tex]\( B(t) \)[/tex] into [tex]\( D(v) \)[/tex]:
- Since [tex]\( v = B(t) \)[/tex], we can rewrite [tex]\( v \)[/tex] in the braking distance formula:
[tex]\[ v = 3t \][/tex]
- Now, substitute [tex]\( v = 3t \)[/tex] into the braking distance formula [tex]\( D(v) \)[/tex]:
[tex]\[ D(3t) = \frac{(3t)^2}{26} \][/tex]
4. Simplify the expression:
[tex]\[ D(3t) = \frac{(3t)^2}{26} = \frac{9t^2}{26} \][/tex]
5. Therefore, the braking distance [tex]\( S(t) \)[/tex] as a function of time [tex]\( t \)[/tex] is:
[tex]\[ S(t) = \frac{9t^2}{26} \][/tex]
So the answer is:
[tex]\[ S(t) = \frac{9t^2}{26} \][/tex]
1. Start with the given formulas:
- The braking distance [tex]\( D(v) \)[/tex] is given by:
[tex]\[ D(v) = \frac{v^2}{26} \][/tex]
- The car's velocity [tex]\( B(t) \)[/tex] at time [tex]\( t \)[/tex] seconds is given by:
[tex]\[ B(t) = 3t \][/tex]
2. We need to find the braking distance [tex]\( S(t) \)[/tex] as a function of time [tex]\( t \)[/tex]. To do this, we will substitute the velocity function [tex]\( B(t) \)[/tex] into the braking distance function [tex]\( D(v) \)[/tex].
3. Substitute [tex]\( B(t) \)[/tex] into [tex]\( D(v) \)[/tex]:
- Since [tex]\( v = B(t) \)[/tex], we can rewrite [tex]\( v \)[/tex] in the braking distance formula:
[tex]\[ v = 3t \][/tex]
- Now, substitute [tex]\( v = 3t \)[/tex] into the braking distance formula [tex]\( D(v) \)[/tex]:
[tex]\[ D(3t) = \frac{(3t)^2}{26} \][/tex]
4. Simplify the expression:
[tex]\[ D(3t) = \frac{(3t)^2}{26} = \frac{9t^2}{26} \][/tex]
5. Therefore, the braking distance [tex]\( S(t) \)[/tex] as a function of time [tex]\( t \)[/tex] is:
[tex]\[ S(t) = \frac{9t^2}{26} \][/tex]
So the answer is:
[tex]\[ S(t) = \frac{9t^2}{26} \][/tex]
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