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

Question

Quizplus · Accepted Answer

The Answer of 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

The Position of an Object Is Given By r→=(−4.00ti^+6.00t3j^)m\overrightarrow{\mathbf{r}}=\left(-4.00 t \hat{\mathbf{i}}+6.00 t^{3} \hat{\mathbf{j}}\right) \mathrm{m}r=(−4.00ti^+6.00t3j^​)m

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