If the Displacement of an Object Is Given in SI $\Delta$

question 59

Multiple Choice

If the displacement of an object is given in SI units by $\Delta$ x = -5t + t ², at t = 2 s its velocity and acceleration are, respectively: (Hint: Use dimensional analysis along with the equations for motion with constant acceleration.)

• A) positive, positive.
• B) positive, negative.
• C) negative, negative.
• D) negative, positive.

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