A particle initially located at the origin has an acceleration of 3.00j m/s² and an initial velocity of 5.00i m/s. Find: a) the vector position of the particle at any time b) the velocity of the particle at any time c) the coordinates of the particle at t = 2.00 s the speed of the particle at t = 2.00 s d)

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Chapter1: Units, Trigonometry. And Vectors
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### Particle Motion Analysis

#### Problem Statement
A particle initially located at the origin has an acceleration of \(3.00 \, \mathbf{j} \, \text{m/s}^2\) and an initial velocity of \(5.00 \, \mathbf{i} \, \text{m/s}\). Find:

a) The vector position of the particle at any time  
b) The velocity of the particle at any time  
c) The coordinates of the particle at \(t = 2.00 \, \text{s}\)  
d) The speed of the particle at \(t = 2.00 \, \text{s}\)  

#### Solution Approach

**a) The vector position of the particle at any time**

To find the vector position \(\mathbf{r}(t)\) of the particle, we need to integrate the velocity function \(\mathbf{v}(t)\). Given that the initial velocity is \( \mathbf{v}(0) = 5.00 \, \mathbf{i} \, \text{m/s} \) and the acceleration \( \mathbf{a} = 3.00 \, \mathbf{j} \, \text{m/s}^2 \):

\[ \mathbf{v}(t) = \mathbf{v}(0) + \mathbf{a}t \]
\[ \mathbf{v}(t) = 5.00 \, \mathbf{i} + 3.00 \, \mathbf{j}t \]

Now, integrating the velocity to find the position:

\[ \mathbf{r}(t) = \int \mathbf{v}(t) \, dt \]
\[ \mathbf{r}(t) = \int (5.00 \, \mathbf{i} + 3.00 \, \mathbf{j}t) \, dt \]
\[ \mathbf{r}(t) = (5.00 \, \mathbf{i})t + \left( \frac{3.00}{2} \, \mathbf{j} \right)t^2 + \mathbf{C} \]

Since the particle starts at the origin, \(\mathbf{r}(0) = 0\):

\[ \mathbf{C} = 0 \]

Thus, the position vector:

\[ \mathbf{r}(t) = 5.00t \, \mathbf{i}
Transcribed Image Text:### Particle Motion Analysis #### Problem Statement A particle initially located at the origin has an acceleration of \(3.00 \, \mathbf{j} \, \text{m/s}^2\) and an initial velocity of \(5.00 \, \mathbf{i} \, \text{m/s}\). Find: a) The vector position of the particle at any time b) The velocity of the particle at any time c) The coordinates of the particle at \(t = 2.00 \, \text{s}\) d) The speed of the particle at \(t = 2.00 \, \text{s}\) #### Solution Approach **a) The vector position of the particle at any time** To find the vector position \(\mathbf{r}(t)\) of the particle, we need to integrate the velocity function \(\mathbf{v}(t)\). Given that the initial velocity is \( \mathbf{v}(0) = 5.00 \, \mathbf{i} \, \text{m/s} \) and the acceleration \( \mathbf{a} = 3.00 \, \mathbf{j} \, \text{m/s}^2 \): \[ \mathbf{v}(t) = \mathbf{v}(0) + \mathbf{a}t \] \[ \mathbf{v}(t) = 5.00 \, \mathbf{i} + 3.00 \, \mathbf{j}t \] Now, integrating the velocity to find the position: \[ \mathbf{r}(t) = \int \mathbf{v}(t) \, dt \] \[ \mathbf{r}(t) = \int (5.00 \, \mathbf{i} + 3.00 \, \mathbf{j}t) \, dt \] \[ \mathbf{r}(t) = (5.00 \, \mathbf{i})t + \left( \frac{3.00}{2} \, \mathbf{j} \right)t^2 + \mathbf{C} \] Since the particle starts at the origin, \(\mathbf{r}(0) = 0\): \[ \mathbf{C} = 0 \] Thus, the position vector: \[ \mathbf{r}(t) = 5.00t \, \mathbf{i}
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