This is question 10 from Serway\'s \"College Physics\" Its not on the list for s

Question

This is question 10 from Serway's "College Physics" Its not on the list for some reason On planet Tehar, the freefall accelration is the same as thaton Earth, but there is also a strong downward eletric field that isuniform close to the planet's surface. A 2 kg ball having acharge of 5 micro Coulombs is thrown upward at a speed of 20.1meters per second, and it hits the ground after 4.1 seconds. What is the potential difference between the starting point and thetop point of the trajectory? This is question 10 from Serway's "College Physics" Its not on the list for some reason On planet Tehar, the freefall accelration is the same as thaton Earth, but there is also a strong downward eletric field that isuniform close to the planet's surface. A 2 kg ball having acharge of 5 micro Coulombs is thrown upward at a speed of 20.1meters per second, and it hits the ground after 4.1 seconds. What is the potential difference between the starting point and thetop point of the trajectory?

Explanation / Answer

The electric force F = Eq Total downward acceleration a = g + F/m = g + Eq/m > g =9.8 m/s^2 Total time travel t = 2v / a = 4.1s ==> a ~ 9.8 m/s^2 So E ~ 0 ==> V ~0 Please check again the value of speed and time because withthose value you give, there's totally no electric field

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