We need to find the gravitational potential energy of the child–Earth system relative to the child's lowest position when the ropes are horizontal. The potential energy is simply given by :

$E=(mg)\times d\\\\E=F\times d\\\\E=310\ N\times 2.1\ m\\\\E=651\ J$

Hence, this is the required solution.

7 0

3 years ago

The rms current output in a circuit is 7.75 A. What is the maximum current?

Andru [333]

The maximum current in an ac circuit is related to the rms current by:
$I_{rms} = \frac{I_0}{ \sqrt{2} }$
where $I_{rms}$ is the rms current and $I_0$ is the maximum current.

If we re-arrange the formula and we use $I_{rms}=7.75 A$ , we can find the value of the maximum current:
$I_0 = \sqrt{2} I_{rms} = \sqrt{2}(7.75 A)=11.0 A$

5 0

3 years ago

If an object measures to be 80 centimeters in length, then it is equivalent to ____

Lana71 [14]

Answer:

31.496 inches

Explanation:

7 0

4 years ago