The Speed of a 4

question 8

Multiple Choice

The speed of a 4.0-kg object is given by v = (2t) m/s, where t is in s. At what rate is the resultant force on this object doing work at t = 1 s?

• A) 48 W
• B) 40 W
• C) 32 W
• D) 56 W
• E) 16 W

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