For a cosine function with amplitude a=0.75 and period t=10, what is y(4)?

y(4) = -0.606    

Explanation:

Given that,

The amplitude of cosine function, A = 0.75

Time period, T = 10

The cosine function is given by :

Since,

We need to find y (4). Put t = 4 in above equation as :

y(4) = -0.606       

Hence, this is the required solution.

force required to detach it is given by

charges are taken to be fundamental charge

now we have

so above is the minimum distance at which it will detach