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3 years ago

12

Gravity____? Help please

2 answers:

Anika [276]3 years ago

8 0

Gravity is described as a fundamental force and therefore does not depend on other forces

HACTEHA [7]3 years ago

3 0

Gravity is a fundamental force. I understand why you asked the question, as the answers are challenging. Gravity <span>does not</span><span> depend upon velocity, nor does friction make gravity work.
The force of gravity affects systems of mass due to the </span>acceleration it creates in a system.

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3 years ago

Suppose that in a lightning flash the potential difference between a cloud and the ground is 1.0*109 V and the quantity of charg

nata0808 [166]

Answer:

a) $U_{e} = 3 \times 10^{10}\,J$ , b) $v \approx 7745.967\,\frac{m}{s}$

Explanation:

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$U_{e} = (30\,C)\cdot (1.0\times 10^{9}\,V)$

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b) Maximum final speed:

$U_{e} = \frac{1}{2}\cdot m \cdot v^{2}\\v = \sqrt{\frac{2\cdot U_{e}}{m} }$

The final speed is:

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3 years ago

Sam is playing football. She kicks the ball with an average force of 75 N.

damaskus [11]

Answer:

22.5J

Explanation:

Here the force is given. Also, the displacement is given as 30cm.

First we should check if all the values are in their standard form.

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