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#1 Help Me ! » Motion Formula and quadratic F. ??? » 2009-12-10 10:06:53
- tabby
- Replies: 1
1-
A boat heads upstream a distance of 24 miles on a river with th curent running 3 miles per hour. Th trip up and back takes 6 hours.
Assuming the boat maintained a constant speed relative to the wate What is its speed ????
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A roller coaster has an initial 70-foot vertical drop. the speed v of the last car t seconds after it starts this descent can be approximated as v=8.12t, where v is in feet per second. The height of the last car from the bottom of this drop ,in feet, can be estimated by h=-0.8t^2 -10 +70. At what time does the last car reach the bottom of the
vertical is the speed of the last car at times ?
#2 Help Me ! » Plz help with this FORMULA » 2009-12-07 03:17:57
- tabby
- Replies: 1
Here is an example:
The formula D = 0.054x2 + 0.058x describes the distance in feet D that it takes to stop a
vehicle traveling x miles per hour on dry pavement.
a. How fast can you drive if you wish to be able to stop your car within 65 feet?
b. On black ice, a trucks stopping distance is 3 times its stopping distance on dry pavement. A
truck traveling 20 miles per hour applies the brakes, on black ice, at a distance of 65 feet in front
of a rubber traffic cone. Will the truck hit the cone?
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In the planning stages of the renovation of an 1800-square-foot space, the amount of office
space allocated per person is increased by 25 square feet when 6 people are removed to a n
adjoining building. How many people share this renovated space after the move?
How much space does each person have?
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