the mass of the car is 1400 kg. The car , initially at rest is moved along a level road by a resultant force of 3500N. The car reaches speed of 30m/s ... calculate the average acceleration and use newtons seconds law , F=m×a

2.5m/s²

Explanation:

Given parameters:

Mass of car  = 1400kg

Resultant force  = 3500N

Speed  = 30m/s

Unknown:

Average acceleration = ?

Solution:

According to the Newton's second law of motion:

     Force  = mass x acceleration

Now;

       3500 = 1400 x acceleration

      Acceleration  =   = 2.5m/s²

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beta is electron from nucleus

something from nucleus has changed, but charge must be same for cons of charge