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hjlf
3 years ago
7

Calculate the energy and power required for a student to bike their way to college from home. The student bikes from home for 0.

8 miles on flat terrain before stopping at a stop sign, then bikes for 0.5 miles before stopping at another stop sign, and then finally reaches the college after biking for 0.4 miles after the second stop sign. Combined Mass of the student and the bike - 175 lbs Maximum speed - 4.9 mph Acceleration and Deceleration - 2.95 ft/s2 CRR = 0.004 A = 5.5 ft2 Cd = 1.1 rho= 1.3 kg/m3

Physics
1 answer:
gregori [183]3 years ago
8 0

Answer:

Check the explanation

Explanation:

To solve the problem, we need to analyze all forces acting on a bicycle individually. In question, student bikes on flat terrain so gravity force doesn't affect the road load. This is the case of uniform acceleration and deceleration so need to calculate average velocity to find Air resistance.

Kindly check the attached images below to see the step by step explanation to the question above.

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Coal is considered a "fossil fuel" and undergoes an extensive process of pressured materials in the Earth's inner core.
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4 years ago
Where do most typical exhaust leaks<br> occur?
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Answer:

an exhaust leak is most likely in your systems manifold or any of the joints along the exhaust system if the leak is the manifold not only will your engine volume increase. but some of them can be located and a running vehicle in the engine bay

Explanation:

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3 0
3 years ago
a student standing in an elevator at rest notices that her pendulum has a frequency of oscillation of 0.5 Hz. a. what is the len
EastWind [94]

Answer:

L = 0.99 m = 99 cm

Explanation:

The period is the reciprocal of the frequency.

T = 1/0.5 = 2.0 s

T = 2π√(L/g)

L = g(T/2π)²

L = 9.8(2.0/2π)² = 0.99 m

If the system accelerates upward, it will cause the apparent gravity to increase. This will require a longer pendulum to keep the same period, or shorten the period if the length remains the same. This shows up in the equation where the product of gravity and the square of the period must remain constant for the length to remain constant.

5 0
3 years ago
The height of the Washington Monument is measured to be 170.00 m on a day when the temperature is 35.0°C. What will its height b
N76 [4]

Answer:

169.98 m

Explanation:

\alpha = Thermal coefficient of marble = 2.5\times 10^{-6}/^{\circ}C

L_0 = Initial length = 170 m

\Delta T = Change in temperature = (-10-35)°C

Change in length is given by

\Delta L=\alpha L_0\Delta T\\\Rightarrow \Delta L=2.5\times 10^{-6}\times 170\times (-10-35)\\\Rightarrow \Delta L=-0.019125\ m

The height on the given day will be 170-0.019125=169.98\ m

3 0
4 years ago
A 50.0 kg object is moving at 18.2 m/s when a 200 N force is applied opposite the direction of the objects motion, causing it to
Gekata [30.6K]

Answer:

t = 1.4[s]

Explanation:

To solve this problem we must use the principle of conservation of linear momentum, which tells us that momentum is conserved before and after applying a force to a body. We must remember that the impulse can be calculated by means of the following equation.

P=m*v\\or\\P=F*t

where:

P = impulse or lineal momentum [kg*m/s]

m = mass = 50 [kg]

v = velocity [m/s]

F = force = 200[N]

t = time = [s]

Now we must be clear that the final linear momentum must be equal to the original linear momentum plus the applied momentum. In this way we can deduce the following equation.

(m_{1}*v_{1})-F*t=(m_{1}*v_{2})

where:

m₁ = mass of the object = 50 [kg]

v₁ = velocity of the object before the impulse = 18.2 [m/s]

v₂ = velocity of the object after the impulse = 12.6 [m/s]

(50*18.2)-200*t=50*12.6\\910-200*t=630\\200*t=910-630\\200*t=280\\t=1.4[s]

3 0
3 years ago
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