While driving his pickup truck, Joe stops at a red light. When the light turns green, Joe steps on the gas and accelerates to 16 m/s in 4 seconds. What is Joe's acceleration?

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Work Shown:

The values we're working with are

We'll plug those into the kinematics formula below to solve for 'a'

Joe's acceleration is 4 m/s^2

This means that every second, Joe's velocity is increasing by 4 m/s.

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To check our answer, we can see that

Time 0 = Velocity 0

Time 1 = Velocity 4

Time 2 = Velocity 8

Time 3 = Velocity 12

Time 4 = Velocity 16

This confirms our answer.

r=rho l/a where a is the area, l is the length and rho is resistivity so the greater the area the lesser the resistance thats why the earth pin is thicker bcos current follow the shortest path, so less resistive .