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HEllo... actually i cant find a category for my questions, so i just ramdomly choose one... sorry. here are my questions...
24. Using appropriate rules used in finding derivatives, determine and hence obtain an expression for (acceptable to leave your answer in terms of s).
25. When the rope is pulled in at the rate of 2 m/s, what is the rate of change of l with respect to time t, ?
26. Using appropriate rule, find the rate of change of s with respect to the time t, .
27. What is the speed of the stuntman when he is 20m (i.e. s=20) from the point A?
28. What is the speed of the stuntman when he is _________m from the point A?
29. What is the speed of the stuntman when he is 110 m from the point A?
please answer them ASAP as i have gotta present them soon.
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Want to answer more questions in the Domesticity category?
Maybe give some free advice about: Cleaning?
24.
dl/ds = 1 / 2[s^2 + 160s + 10000]^0.5 * (2s + 160)= (s + 80) / [s^2 + 160s + 10000]^0.5
ds/dl = [s^2 + 160s + 10000]^0.5 / (s + 80)
25.
dl/dt = -2m/s
26.
Ds/dt = ds/dl * dl/dt= [s^2 + 160s + 10000]^0.5 / (s + 80) * 2= 2[s^2 + 160s + 10000]^0.5 / (s + 80)
27.
Ds/dt = 2[{20}^2 + 160{20} + 10000]^0.5 / ({20} + 80)= 2.33 m/s (3 s.f.)
28.
2 2/3 m/s
29.
cannot be done cause the length is longer than 100 m.
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