Asked by mary
A 12-kg turtle rests on the bed of a zookeeper’s truck, which is traveling down a country road at 55 mi/h. The zookeeper spots a deer in the road, and slows to a stop in 12 s. Assuming constant acceleration, what is the minimum coefficient of static friction between the turtle and the truck bed surface that is needed to prevent the turtle from sliding?
Answers
Answered by
bobpursley
F=ma
mu(mg)=ma
for a, change 55mi/hr to m/s
a=changevelocity/timeinseconds
solve for mu.
mu(mg)=ma
for a, change 55mi/hr to m/s
a=changevelocity/timeinseconds
solve for mu.
Answered by
mary
so i change 55m/hr to 11m/720s. to solve for mu i times that by 12? then i get 11m/60s??
Answered by
bobpursley
Good lord.
Put this int he google search window:
55miles/hr in m/s
Then use that (about 24m/s)
mu*g=(24-0)/12
mu= 2/9.8 about .2
Put this int he google search window:
55miles/hr in m/s
Then use that (about 24m/s)
mu*g=(24-0)/12
mu= 2/9.8 about .2
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