A 50-g ball moving at 10 m/s in the +x direction suddenly collides head-on with a stationary ball of mass 100 g. If the collisio
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To solve this problem it is necessary to apply the concepts related to energy as a function of voltage, load and force, and the definition of Force given by Newton in his second law.
By definition we know that force is equal to
F= ma
Where,
m = mass (at this case of an electron)
a = Acceleration
But we also know that the Energy of an electric object is given by two similar definitions.
Where,
F= Force
q = Charge of proton/electron
V = Voltage
d = Distance
Equating and rearrange for F,
The two concepts of force can be related to each other, then
Acceleration would be,
Replacing with our values we have that the acceleration is
Now through the cinematic equations of motion we know that,
Where,
Final velocity
Initial velocity
a = Acceleration
x = Displacement
Re-arrange to find v_f,
Therefore the electron's speed when it is 0.1 cm from the negative plate is