The free fall distance for Earth is given by the formula D=4.9* T , where Dis distance in meters and T is time in seconds. How long would it take a
package dropped from a plane flying at 8,300 meters (25,000 feer) to land
on the ground?

Asmall 12.00g plastic ball is suspended by a string in a uniform, horizontal electric field with a magnitude of 10^3 n/c. if the ball is in equilibrium when the string makes a 30 ° angle with the vertical, what is the net charge on the ball?