Use the Position Equation $s = - 14 t ^ { 2 } + v _ { 0 } t + s _ { 0 }$

question 118

Multiple Choice

Use the position equation $s = - 14 t ^ { 2 } + v _ { 0 } t + s _ { 0 }$ , where $S$ represents the height of an object (in feet) , $V _ { 0 }$ represents the initial velocity of the object (in feet per second) , $S _ { 0 }$ represents the Initial height of the object (in feet) , and $t$ represents the time (in seconds) .
A projectile is fired straight upward from ground level $\left( s _ { 0 } = 0 \right)$ with an initial velocity of $112$ feet Per second. At what instant will it be back at ground level?

• A) \(t = 10 \mathrm { Sec }\)
• B) \(t = 8 \mathrm { Sec }\)
• C) \(t = 7 \mathrm { Sec }\)
• D) \(t = 6 \mathrm { Sec }\)
• E) \(t = 9 \mathrm { Sec }\)

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Definitions:

IRR Cross-over

A concept where two projects have the same initial investment but differing cash flows leading to points at which their internal rates of return intersect.

NPV

Net Present Value is a financial metric that calculates the present value of all net cash flows (positive and negative) from an investment, discounted back at the investor's required rate of return.

Required Return

The minimum expected return an investor demands for a particular investment, reflecting the investment's risk.

NPV

An alternative measure for Net Present Value, reflecting the difference in the present value of cash inflows and outflows over a period of time.