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Amiraneli [1.4K]
3 years ago
7

a vehicle changes its velocity from 90 km/h to a dead stop in 10s. show that its acceleration in doing so is -2.5m/s^2

Physics
1 answer:
telo118 [61]3 years ago
4 0

90000m/3600s = 25 m/s

a=0-25/10 ⇒ a = - 5/2 m/s^2

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Read 2 more answers
a 360 mile trip began on a greeway in a car traveling at 62 mph. Once the road became a 2 lane highway, the car slowed to 54 mph
Daniel [21]

Answer:

Time spent on the greenway road  = 4.5 hours

Time spent on the 2 lane road = 1.5 hours

Explanation:

The distance of the trip  is 360 miles and the initial speed of the car is 62 miles/hr and after the road became 2 lane highway the car slowed to 54 miles/hr.

Let us divide the trip into two

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speed = distance/time

speed = 62 mph

time = a

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speed = distance/time

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time = b

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Total time

a + b = 6..............................(ii)

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8 0
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