10 points Suppose there are two objects, each with a charge of +2.0 Coulomb are
separated by a distance of 1 meter. Determine the magnitude of the
electric force between them.
3.6 x 10^10 N
9 x 10^9 N
1.8 x 10^10 N
4N

If a rock is thrown upward on the planet mars with a velocity of 12 m/s, its height (in meters) after t seconds is given by h = 12t − 1.86t2. (a) find the velocity of the rock after two seconds. m/s (b) find the velocity of the rock when t = a. 12−3.72a m/s (c) when will the rock hit the surface? (round your answer to one decimal place.) t = s (d) with what velocity will the rock hit the surface? m/s