Starting at Time T = 0, an Object Moves Along

question 78

Multiple Choice

Starting at time t = 0, an object moves along a straight line. Its coordinate in meters is given by x(t) = 75t - 1.0t³, where t is in seconds. When it momentarily stops its acceleration is:

• A) 0
• B) -73 m/s²
• C) -30 m/s²
• D) -9.8 m/s²
• E) 9.2* 10³ m/s²

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Definitions:

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