Which has the most inertia? question 2 options: a) a sports car going 210 mph around the track b) your pet dog/cat/horse/bird/fish moving at their fastest speed c) a cruise ship docked in a port d) a pebble travelling through space at 90,500,000 km/s

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