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Komok [63]
3 years ago
10

As you are cycling to the Q center one spring day, you pass the construction site at Gant and stop to watch a few minutes. A cra

ne holds bricks on a pallet to an upper floor of the building. Suddenly, a brick falls off the rising pallet. You clock the time it takes to hit the ground at 2.5 s. From how high did the brick fall?
Physics
1 answer:
Rama09 [41]3 years ago
7 0

Answer:

30.63 m

Explanation:

Using y = ut + 1/2gt² where u = initial speed of block = 0 m/s, g = acceleration due to gravity = 9.8 m/s² and t = time of fall = 2.5 s and y = height of fall.

So, substituting the values of the variables into the equation, we have

y = ut + 1/2gt²

y = 0 m/s × 2.5 s + 1/2 × 9.8 m/s² × (2.5 s)²

y = 0 m + 4.9 m/s² × 6.25 s²

y = 0 m + 30.625 m

y = 30.625 m

y ≅ 30.63 m

So, the brick fell 30.63 m

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Industrial revolution is the reason of human population increase in 1700's and 1800's.

<h3><u>Explanation:</u></h3>

Industrial revolution is the event that took in the 18th and early 19th century in Europe and then to other parts of the world. In this revolution, there was huge implementation of machines and artificial objects in the daily lives which hugely contributed to the development of quality of product, greatly decreased the production time and costing, etc.

This led to increase in luxury in the lives of people and there was widespread change in the mode of living of the people all over the world.  

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A car of mass 1000 kg is travelling at 10 m/s. What is its kinetic energy?
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Answer:

50,000

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A fire hose held near the ground shoots water at a speed of 6.5 m/s. At what angle(s) should the nozzle point in order that the
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Answer:

17.72° or 72.28°

Explanation:

u = 6.5 m/s

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Let the angle of projection is θ.

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R=\frac{u^{2}Sin2\theta }{g}

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Sin 2θ = 0.58

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As we know that the range is same for the two angles which are complementary to each other.

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8 0
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It d I took the test

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