A Projectile Starts at the Coordinate Origin, Where the Displacement $\theta$

question 10

Multiple Choice

A projectile starts at the coordinate origin, where the displacement vector also originates. The initial velocity, v0, makes an angle $\theta$ 0 with the horizontal where 0 < $\theta$ 0 < 90 $\degree$ . At the instant when the projectile is at the highest point of its trajectory, the displacement, velocity and acceleration vectors are $\overrightarrow{\mathbf{r}}$ , $\overrightarrow{\mathbf{v}}$ and $\overrightarrow{\mathbf{a}}$ . Which statement is true?

• A) \(\overrightarrow{\mathbf{r}}\) is parallel to \(\overrightarrow{\mathbf{v}}\) .
• B) \(\overrightarrow{\mathbf{r}}\) is perpendicular to \(\overrightarrow{\mathbf{v}}\) .
• C) \(\overrightarrow{\mathbf{v}}\) is parallel to \(\overrightarrow{\mathbf{a}}\) .
• D) \(\overrightarrow{\mathbf{v}}\) is perpendicular to \(\overrightarrow{\mathbf{a}}\) .
• E) \(\overrightarrow{\mathbf{r}}\) is perpendicular to \(\overrightarrow{\mathbf{a}}\) .

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Definitions:

Cash Flow Statement

A financial document detailing the inflow and outflow of cash in a business, thereby indicating its operating, investing, and financing activities over a period.

Statement of Equity

A financial document that outlines the changes in the equity section of the balance sheet during a certain period, including profits retained in the business, dividends paid, and equity capital injections.

Gross Profit

The difference between revenue and the cost of goods sold before deduction of overheads, interests, and taxes.

Gross Sales

The revenue earned from the sale of merchandise to customers.