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A catapult fires an 800-kg rock with an initial velocity of 100 m/s at a 40° angle to the ground. The magnitude of the vertical impulse the catapult receives from the rock is
a.5.1 ´ 104 N × s.
b.6.1 ´ 104 N × s.
c.8.0 ´ 104 N × s.
d.5.0 ´ 105 N × s.
e.6.0 ´ 105 N × s.
a.5.1 ´ 104 N × s.
b.6.1 ´ 104 N × s.
c.8.0 ´ 104 N × s.
d.5.0 ´ 105 N × s.
e.6.0 ´ 105 N × s.