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2 years ago

A rock is dropped from a helght of 2.5 meters. What is its velocity when it reaches the ground?

Physics

1 answer:

Nataly_w [17]2 years ago

7 0

u=0 m/s

h=2.5m

Using kinematic eq:

${v}^{2} - {u}^{2} = 2gh \\ {v}^{2} - {0}^{2} = 2gh \\ v = \sqrt{2gh} \\ v = \sqrt{2 \times 10 \times 2.5} \\ v = \sqrt{50} \\ v = 7.07m/s$

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Explanation:

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2 years ago

Object A and object B are initially uncharged and are separated by a distance of 1 meter. Suppose 10,000 electrons are removed f

bija089 [108]

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Let's call the magnitude of the charge of 10000 electrons $q$ .

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By Coulomb's law, the force between them is

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3 years ago

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3 years ago

The momentum of blue whale with a mass of 146,000 kg and a top swimming speed of 24 km/hr is kg·m/s.

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3 years ago

Which phrase best describes sir isaac newton's contributions to modern science and therefore to the industrial revolution?

MrMuchimi

Can you please give the phrases?

But, I'll help what I can.

First, he was the first to discover gravity. He was not bonked by the head by an apple, rather he watched an apple fall from a tree before he decided to explore gravity further.

He was also the first scientist to be knighted, which is a great honor, as you can expect.

Newton also developed The Three Laws of Motion. They are extremely important to physics and are considered some of the foundation for physics today.

He also discovered calculus, which is complex math that is very helpful to scientists today.

He also discovered the color spectrum using a glass prism, a dark room and window shade with a hole in it. He was able to project the color spectrum onto a piece of paper.

Those are the few I can think of now, but hope it helps!

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3 years ago