What is the force, in units of femtonewtons, on an electron moving at a velocity of 7.26 x 106 ms-1 perpendicularly to a magnetic field when the magnetic flux density of 0.049 t?

56.9 fN

Explanation:

The force exerted on the electron is:

where

B is the magnetic field strength

q is the electron's charged

v is the speed of the electron

In our problem,

B = 0.049 T

Therefore, the force is

b

explanation:

what is the speed of a softball that travels 20m in 2secs

speed = 20/2 = 10 m/s