A constant force of 7 N acts for 6 s. What is the impulse?

A) 21 N·s

B) 63 N·s

C) 84 N·s

D) 42 N·s

Answer: D

Explanation: Use impulse = force × time for the stated idealized conditions. Substitution gives 7 × 6 = 42 N·s.

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