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Aleks04 [339]
3 years ago
15

6) A ball free falls from the top of the roof for 5 seconds. How far did it fall? What is its final

Physics
1 answer:
gayaneshka [121]3 years ago
5 0

Answer:

distance fallen = 122.5 m

speed = 49 m/s

Explanation:

Δd = vi*t - 0.5at^2

Δd = 0 - 0.5(9.8)(5^2)

Δd = -122.5 (i.e. 122.5m down)

a = (vf - vi) / t

9.8 = (vf - 0) / 5

vf = 49

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2 years ago
A type of friction that occurs when air pushes against a moving object causing it to negatively accelerate
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hope this helps

brainliest appreciated

good luck! have a nice day!

6 0
3 years ago
It has been observed that electrical connectors manufactured by Jolt Electrical Supply Company last an average of 18.2 months an
Viktor [21]

Answer:

Jolt can expect to replace 160 units.

Explanation:

given data:

standard deviation 1.7

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number of unit of Jolt that need to be replace, on average is  0.319*500 = 160 units.

7 0
3 years ago
A reaction in which x and y form products was found to be first order in x and zero order in y. by what factor will the rate of
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In zero order reactions the rate of reaction is independent of reactant concentrations. That is the rate of the reaction does not vary with increasing nor decreasing reactants concentrations. On the other hand, first order reaction are reactions in which the rate of reaction is directly proportional to the concentration of the reacting substance (reactants). In this case, i believe the rate of reaction will triple( increase by a factor of 3)
7 0
3 years ago
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