A car traveling at a speed of 30 m/s comes to a stoplight. How much time will it take for the car to stop if its acceleration is -4.0 m/s2? A) 0.75 sec

B) 1.3 sec

C) 7.5 sec

D) -7.5 sec

I’m good with pshycology

The answer is 4f======since electrostatic force is given by    we let f be the electrostatic force when  r = 1 m    if we let  denote the electrostatic force when the distance is decreased so that r = 0.5m, then    we established earlier that f = kq₁q₂. therefore    the force will now be 4f.

Because they're in different places for this the temperature varies.