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Author Question: A motorboat is travelling with a velocity of 40 ft/sec when its motor shuts off at time t = 0. ... (Read 80 times)

awywial

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on: May 26, 2021
A motorboat is travelling with a velocity of 40 ft/sec when its motor shuts off at time t = 0. Thereafter its deceleration, due to water resistance, is given by   = -kv2  where k is a positive constant. After 10 seconds, the boat's velocity is measured to be 20 ft/sec.
(a)What is the value of k?
(b)When will the boat slow to 5 ft/sec?  

◦ (a)  k =   (b)  700 s
◦ (a)  k =   (b)  100 s
◦ (a)  k =   (b)  250 s
◦ (a)  k =   (b)  70 s
◦ (a)  k =   (b)  140 s
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Marked as best answer by awywial on May 26, 2021

amanda_14

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Reply #1 on: May 26, 2021
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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awywial

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Reply 2 on: May 26, 2021
Wow, this really help

emsimon14

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

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