Answer:
The magnitude of the magnetic force acting on the wire is zero, because the magnetic field is parallel to the wire.
In fact, the magnetic force exerted by the magnetic field on the wire is
where I is the current in the wire, L the length of the wire, B the magnetic field intensity and the angle between the direction of B and the wire. In our problem, B and the wire are parallel, so the angle is and so , therefore the magnetic force is zero: F=0.
In order to measure the size of the electrical current flowing in the circuit,
the current must pass through the meter.
Medicine to a patient. That should be calculated based on weight, strength/dosage and possibly other factors
Explanation:
It is given that,
Mass of a bungee jumper is 65 kg
The time period of the oscillation is 38 s, hitting a low point eight more times.It means its time period is
![T=\dfrac{38}{8}\\\\T=4.75\ s](https://tex.z-dn.net/?f=T%3D%5Cdfrac%7B38%7D%7B8%7D%5C%5C%5C%5CT%3D4.75%5C%20s)
After many oscillations, he finally comes to rest 25.0 m below the level of the bridge.
For an oscillating object, the time period is given by :
![T=2\pi \sqrt{\dfrac{m}{k}}](https://tex.z-dn.net/?f=T%3D2%5Cpi%20%5Csqrt%7B%5Cdfrac%7Bm%7D%7Bk%7D%7D)
k = spring stiffness constant
So,
![k=\dfrac{4\pi ^2m}{T^2}\\\\k=\dfrac{4\pi ^2\times 65}{(4.75)^2}\\\\k=113.43\ N/m](https://tex.z-dn.net/?f=k%3D%5Cdfrac%7B4%5Cpi%20%5E2m%7D%7BT%5E2%7D%5C%5C%5C%5Ck%3D%5Cdfrac%7B4%5Cpi%20%5E2%5Ctimes%2065%7D%7B%284.75%29%5E2%7D%5C%5C%5C%5Ck%3D113.43%5C%20N%2Fm)
When the cord is in air,
mg=kx
x = the extension in the cord
![x=\dfrac{mg}{k}\\\\x=\dfrac{65\times 9.8}{113.6}\\\\x=5.6\ m](https://tex.z-dn.net/?f=x%3D%5Cdfrac%7Bmg%7D%7Bk%7D%5C%5C%5C%5Cx%3D%5Cdfrac%7B65%5Ctimes%209.8%7D%7B113.6%7D%5C%5C%5C%5Cx%3D5.6%5C%20m)
So, the unstretched length of the bungee cord is equal to 25 m - 5.6 m = 19.4 m
They are falling under the sole influence of gravity all objects<span> will </span>fall<span> with the </span>same<span> rate of </span><span>acceleration needless of there size</span>