A 30-Kg Particle Has a Position Vector Given By By \overrightarrow{\mathbf{r}}=\left(2.0

question 41

Multiple Choice

A 3.0-kg particle has a position vector given by $\overrightarrow{\mathbf{r}}=\left(2.0 t^{2} \hat{\mathbf{i}}+3.0 \hat{\mathbf{j}}\right)$ where $\overrightarrow{\mathbf{r}}$ is in metres and t is in seconds. What is the angular momentum of the particle, in kg.m²/s, about the origin at t = 2 s?

• A)72
• B)(-72 )
• C)24
• D)(-24 )
• E)22

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