The Position of an Object Is Given By $\overrightarrow{\mathbf{r}}=\left(-4.00 t \hat{\mathbf{i}}+6.00 t^{3} \hat{\mathbf{j}}\right) \mathrm{m}$

question 24

Multiple Choice

The position of an object is given by $\overrightarrow{\mathbf{r}}=\left(-4.00 t \hat{\mathbf{i}}+6.00 t^{3} \hat{\mathbf{j}}\right) \mathrm{m}$ where t is in seconds. At t = 2.0 s, what is the magnitude of the particle's acceleration?

• A)0 m/s2
• B)2.0 m/s2
• C)17 m/s2
• D)36 m/s2
• E)72 m/s2

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