A 6.2 kg bowling ball that weighs 60.76 N is accelerating at 1.8 m/s2. After 2 seconds, it reaches a speed of 3.6 m/s. What is its momentum at this point?
A. 22.3 kg-m/s
B. 16.9 kg-m/s
C. 11.2 kg-m/s
D. 1.7 kg-m/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