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Flura [38]
3 years ago
6

When Ricky sells his used desk for $50, money is a _____.

Physics
2 answers:
9966 [12]3 years ago
8 0
Medium of exchange, im doing oddessey rn and this is correct.

sweet-ann [11.9K]3 years ago
3 0
The answer is the first option. When Ricky sells his used desk for $50, money is a medium of exchange.<span> As you can see, money permits that Ricky gets rid of his desk (because he prefers the $50 dollars, likely to perform other purcahse) while the purchaser of the desk prefers the used desk over the $50 (likely because he needed a desk and did not want to spend more than $50). In this way, the money permits that one purchases the product that he wanted (the used desk) and permits that Ricky has money to purchase othet object that he wants.</span>
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Answer:

69.68 N

Explanation:

Work done is equal to change in kinetic energy

W = ΔK = Kf - Ki = \frac{1}{2} mv^{2} _{f}  - \frac{1}{2} mv^{2} _{i}

W = F_{total} .d

where m = mass of the sprinter

vf = final velocity

vi = initial velocity

W  = workdone

kf = final kinetic energy

ki = initial kinetic energy

d = distance traveled

Ftotal = total force

vf = 8m/s

vi= 2m/s

d = 25m

m = 60kg

inserting parameters to get:

W = ΔK = Kf - Ki = \frac{1}{2} mv^{2} _{f}  - \frac{1}{2} mv^{2} _{i}

F_{total} .d =\frac{1}{2} mv^{2} _{f}  - \frac{1}{2} mv^{2} _{i}

F_{total} = \frac{\frac{1}{2} mv^{2} _{f} - \frac{1}{2} mv^{2} _{i}}{d}

F_{total=} \frac{\frac{1}{2} X 62 X6^{2} -\frac{1}{2} X 62 X2^{2} }{25}

= 39.7

we know that the force the sprinter exerted F sprinter, the force of the headwind Fwind = 30N

F_{sprinter} = F_{total} + F_{wind}  = 39.7 + 30 = 69.68 N

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