Step-by-step explanation:
72km/h = 72,000m/3,600s = 20m/s.
Using Kinematics, we have
v = u + at
= (20m/s) + (-2m/s²)(5s)
= 10m/s.
Hence the velocity will be 10m/s. (or 36km/h)
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Answer:
Step-by-step explanation:
total weight is 4 tons.
ratio of weight of truck to weight of coal is 7:5....added = 12
so 7/12 of the total weight is the truck's
and 5/12 of the total weight is the coal
7/12 of 4 tons = 7/12 * 4 = 28/12 = 2 1/3 tons <== weight of truck
5/12 of 4 tons = 5/12 * 4 = 20/12 = 1 2/3 tons <== weight of coal
The height of the candle after 8 hours is 19.2 centimeters
<h3>How to determine the height of the candle after 8 hours?</h3>
The given parameters are:
Slope, m = -0.6
Points: (x, y) = (17, 13.8)
A linear equation can be represented as:
y = m(x - x1) + y1
Substitute the points (x, y) = (17, 13.8) in the above equation y = m(x - x1) + y1
So, we have
y = m(x - 17) + 13.8
The slope is -0.6
So, we have:
y = -0.6(x - 17) + 13.8
After 8 hours, we have
x = 8
Substitute x = 8 in y = -0.6(x - 17) + 13.8
y = -0.6(8 - 17) + 13.8
Evaluate
y = 19.2
Hence, the height of the candle after 8 hours is 19.2 centimeters
Read more about linear equations at:
brainly.com/question/14323743
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The answer would be B, C, and D.