An electron moving at right angles to a 0.14 t magnetic field experiences an acceleration of 6.5×1015 m/ s 2 . what is the electron's speed? express your answer using two significant figures. by how much does its speed change in 1 ns( 10 −9 s) ?

, the speed does not change

Explanation:

The magnetic force on the electron is equal to the product between its mass and its acceleration:

where

q is the electron charge

v is the electron speed

B = 0.14 T is the magnetic field

m is the electron's mass

is the acceleration (centripetal acceleration)

Solving for v, we find

The speed of the electron does not change, because the acceleration is a centripetal acceleration, so it acts perpendicular to the direction of motion of the electron; therefore, no work is done on the electron by the magnetic force, and therefore the electron does not gain kinetic energy, which means that its speed does not change.

acceleration = (change in speed) / (time for the change)

change in speed = (20-120)= -100 m/s.

1.5 min = 90 sec

acceleration = -100/90 = -1.11 m/s^2.

we don't care about the 150kg or the 2,500 meters. they don't make any difference.

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unbalanced force

explanation: