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.
Correct Answer:
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