Answer:
Explanation:
In order to find the work done by the force, we use the work-energy theorem, which states that the work done by a force on an object is equal to the change in kinetic energy of the object. Mathematically:
(1)
where
W is the work done
m is the mass of the object
v is the final speed of the object
u is the initial speed
In this problem, we have:
m = M is the mass of the object
The position of the object at time t is
We can find its speed at time t by calculating the derivative of the position:
Therefore:
- The speed at time t = 0 is
- The speed at time t = T is
Substituting into eq.(1), we find the work done:
Answer:
a) 4.6*10^{-5} J
b) 6133.33 J/C
c) 94358.9 C
Explanation:
(a) We have that the change in the kinetic energy equals the net work over the charge. Hence we have
where Ek is the kinetic energy, W is the work of the external force and WE is the work done by the electric field. By replacing we obtain:
(b) The potential difference is computed by using:
(c) With the work done by the electric force we can calculate the Electric field. By using the following formula we obtain:
where we have used d=6.5cm=6.5*10^-9m and q=7.5nC=7.5*10^-9C
hope this helps!!
After a thorough research, there exists the same question that has the following choices.
<span>(1) angles less than 45°, only
(2) an angle of 45°, only
(3) angles greater than 45°, only
<span>(4) all angles of incidence
The correct answer (4) all angles of incidence.</span></span>
Electromagnetic force.
Hope I helped :-)
