1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
sesenic [268]
3 years ago
10

The drag force Fd, imposed by the surrounding air on a vehicle moving with velocity V is given by:

Physics
1 answer:
faltersainse [42]3 years ago
4 0

Answer:

Explanation:

a)

Given that:

V = 25 mi/hr

To ft/sec, we have:

V = 25 \times \dfrac{5280}{3600} ft/s

V =  \dfrac{110}{3} ft/s

\rho = 0.075 \ lb/ft^3

\rho = 0.075 \times \dfrac{1 \ lbf s^2/ft}{32.174 \ lbm}

\rho =  \dfrac{0.075}{32.174 } lbf.s^2/ft^4

C_d = 0.28

A = 25ft²

Recall that:

The drag force F_d =\dfrac{C_dA \rho V^2}{2}

F_d =\dfrac{1}{2}\times 0.28 \times 25\times \dfrac{0.075}{32.174}\times (\dfrac{110}{3})^2

F_d =10.967 \ lbf

P = F_dV \\ \\  P = 10.97 \times (\dfrac{110}{3}} \\ \\  P = 402.3  \ hp

For 70 miles per hour, we have:

V = 70 \times \dfrac{5280}{3600} ft/s

V =  \dfrac{308}{3} ft/s

The drag force F_d =\dfrac{C_dA \rho V^2}{2}

F_d =\dfrac{1}{2}\times 0.28 \times 25\times \dfrac{0.075}{32.174}\times (\dfrac{308}{3})^2

F_d =85.99 \ lbf

P = F_dV \\ \\  P = 85.99 \times (\dfrac{308}{3}}) \\ \\  P = 8828.2  \ hp

You might be interested in
Part B
dimaraw [331]

At the left side of the reaction

Explanation:

the reaction is spontaneous

8 0
4 years ago
A boy throws a ball at a brick wall compare and contrast the force exerted by the ball into the wall and a force exerted by the
notka56 [123]
The ball is gonna bounce back duh
3 0
3 years ago
When a hair dryer is being used, one of the energy transformations that takes place is
Maru [420]
Hello,

The answer is B) <span>electrical to mechanical.
</span><span>
When a hair dryer is being used, one of the energy transformations that takes place is </span>electrical to mechanical. Once you plug the hair dryer into the outlet, an electric current flows, starting the mechanical hair dryer.

Faith xoxo<span />
3 0
3 years ago
Read 2 more answers
Which of the following is true about the Sun?
bekas [8.4K]
A. The Sun is the only star in the Solar System. This is the only star we know of.
I hope this helps!!
6 0
2 years ago
Neo and Morpheus's masses have gained a velocity (not equal to zero) which means their momentum is now _____ .
Arte-miy333 [17]
<span>Neo and Morpheus's masses have gained a velocity (not equal to zero) which means their momentum is now based on gravity and friction alone.</span>
6 0
3 years ago
Read 2 more answers
Other questions:
  • Rank the stars based on their current age, from oldest to youngest. If two (or more) stars have approximately the same age (that
    8·1 answer
  • When a continental tropical air mass influence the united states what kinds of weather does it bring with it?
    10·2 answers
  • Standing on a mountain, you look towards another mountain 6.00 km away, on which there are two persons standing 1.00 meter apart
    10·1 answer
  • A snowball is launched horizontally from the top of a building at v = 19.6 m/s. If it lands d = 64 meters from the bottom, how h
    10·1 answer
  • A torque of 12 N*m is applied to a solid uniform disk of radius 0.50 m. If the disk accelerates at 2.6 rad/s^2 what is the mass
    12·1 answer
  • The term solstice translates as "Sun stop." Explain why this translation makes sense from an astronomical point of view. It make
    10·2 answers
  • What is the force between two negatively charged objects if q1 = 2.5x10^-6 C, q2 = 4.3x10-6 C and the distance between the charg
    6·1 answer
  • Post-exposure radiation levels are approximately Normally distributed. The levels (in Sv) of a random sample of three trauma vic
    8·1 answer
  • g Suppose that the Red cart has a mass of 500 grams, and the blue cart has a mass of 250 grams, and they are connected with a sp
    9·1 answer
  • A hydraulic vane pump has a real flow of 20 liters per minute, a pressure of 230 bar, a pump speed of 1400 rpm. Know that the in
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!