An electron has an initial speed of 4.04 × 105 m/s. if it undergoes an acceleration of 3.3 × 1014 m/s 2 , how long will it take to reach a speed of 7.07 × 105 m/s?

Time taken,

Explanation:

Given that,

Initial speed of the electron,

Acceleration of the electron,

Final speed of the electron,

We need to find the time taken by the electron to reach its final speed. It can be calculated using first equation of motion as :

So, the time to reach its final speed is . Hence, this is the required solution.

the answer would be a

the bal will not change its velocity.