How Do Electrons Impact Screen Pressure in Televisions?

[moeraeleizhaj]

In a TV, electrons with a speed of 7.31 x 107 m/s strike the screen from behind, causing it to glow. The electrons come to a halt after striking the screen. Each electron has a mass of 9.11 x 10-31 kg, and there are 7.97 x 1016 electrons per second hitting the screen over an area of 2.15 x 10-7 m2. What is the pressure that the electrons exert on the screen?

Hi, can anyone help me please? I really don't know how to start this question. It confuses me a lot.

 

[LowlyPion]

Force is F=m*a. And Pressure is F/A where A is area.

Force is also dP/dt where P is momentum mv.

Now you know what the rate of momentum the screen is absorbing by the m*v of the total number of electrons in the stream of electrons in a second. And you know the area over which they want the Pressure.