The motion of an electron is given by x(t)=pt3+qt2+r, with p = -2.3 m/s^3 ,q = +1.5 m/s^2 , and r = +9.0 m. a) determine its velocity at t=0.b) determine its velocity at t=1s. c) determine its velocity at t=2s. d) determine its velocity at t=3s.

Explanation:

Instant Velocity

Given the position as a function of time x(t), the instant velocity is the derivative of the function:

We are given the position as

The derivative of x is

A) Let's compute v(0)

B)  

C)

D)

i'm just gonna leave this comment here, so i can get a challange done-

explanation:

the minimum amperage that the current in this wire would have to have so that its weight is completely supported by the magnetic force due to earth's field, assuming that no other forces except gravity act on it