Answer:
velocity = distance / time
distance = speed * time
Distance= 7*3 = 21
V = 21/3
V = 7
Explanation:
Answer:
Acceleration, 
Explanation:
It is given that,
Side of the square plate, l = 1 m
Charge on the square plate, 
Position of a proton, x = 1 cm
The electric field due to a parallel plate is given by :

Electric force is given by :
F = q E

e is the charge on electron
The acceleration of the proton can be calculated as :

m is the mass of proton



So, the acceleration of the proton is
. Hence, this is the required solution.
I think this is vectors. Sketch the two vectors A and B on the x axis and then find their magnitudes using cosine... i would like to know if i am correct.