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
Burka [1]
3 years ago
9

The drag force pushes opposite your motion as you ride a bicycle. If you double your speed, what happens to the magnitude of the

drag force? a.The drag force goes up by a factor of 4 b.The drag force stays the same. c.The drag force decreases. d.The drag force doubles as well
Physics
1 answer:
SpyIntel [72]3 years ago
5 0

Answer:

F_d,1 / F_d,o =  4 , Option A

Explanation:

Given:

- The velocity of the bike V_o is doubled to 2*V_o

Find:

what happens to the magnitude of the drag force?

Solution:

- The expression of the Drag force as a function of objects area, coefficient of drag, velocity and density of medium is given by:

                                 F_d = 0.5*C_d*A*p*V^2 / 2

- In our case the force of drag with speed V_o is:

                                F_d,o = 0.5*C_d*A*p*V_o^2 / 2

- force of drag with speed 2V_o is:

                                 F_d,1 = 2*C_d*A*p*V_o^2 / 2

- Take the ratio of F_d,1 to F_d,o:

                  F_d,1 / F_d,o =  (2*C_d*A*p*V_o^2 / 2) / (0.5*C_d*A*p*V_o^2 / 2)

We get:                      F_d,1 / F_d,o =  4

Hence, by doubling the speed the magnitude of drag force is increased by a factor of 4.    

You might be interested in
The formula used to find force is F=m*v.<br> true or false
zepelin [54]

It's true IF ' m ' stands for mass and ' v ' stands for acceleration. Otherwise it's false.

4 0
3 years ago
If Scobie could drive a Jetson's flying car at a constant speed of 160.0 km/hr across oceans and space, approximately how long w
DochEvi [55]

Scobie will take 10 days to drive around Earth's equator.

To calculate the time that takes Scobie to drive around Earth's equator we need to find the distance, which is given by the equation of a circumference:

d = 2\pi r

<em>Where:</em>

r: is the Earth's radius = 6371 km

Then, the distance is:

d = 2\pi r = 2\pi*6371 km = 40030.2 km

Now, if we divide the above distance by the speed of the car we can find the time:

t = \frac{d}{v} = \frac{40030.2 km}{160.0 km/h} = 250.2 h*\frac{1 d}{24 h} = 10 d

Therefore, Scobie will take 10 days to drive around Earth's equator.

     

To learn more about distance and time here: brainly.com/question/14236800?referrer=searchResults

I hope it helps you!

6 0
3 years ago
A car accelerates from zero to a speed of 110
Verizon [17]

The car's rate of  acceleration : a = 2.04 m/s²

<h3>Further explanation</h3>

Given

speed = 110 km/hr

time = 15 s

Required

The acceleration

Solution

110 km/hr⇒30.56 m/s

Acceleration is the change in velocity over time

a = Δv : Δt

Input the value :

a = 30.56 m/s : 15 s

a = 2.04 m/s²

3 0
3 years ago
during a space shuttle launch about 830,000 kg of fuel is burned in 8 min. the fuel provides the shuttle with a constant thrust,
kirill115 [55]
The shuttles acceleration in the creases as the fuel is burned because the acceleration of the obect as produced by net force is directly proportional to the magnitude of the net force.
8 0
3 years ago
3. How is using a model to study cells helpful?
4vir4ik [10]

Answer:

Yes, it is very helpful.

Explanation:

It's helpful since in a cell, plant or animal, there are a lot of different things. It's hard to memorize everything and know what they look like. Using a model can help you memorize everything better and even understand it better. If someone asked me where or what something was in a cell I think I would be able to recognize it better.

I hope this helps!

6 0
3 years ago
Other questions:
  • What would it be like to walk on Venus?
    6·1 answer
  • Name some elements that have a symbol that is entirely different from the spelling of the world
    15·1 answer
  • Graylag goslings imprint on a nearby object that moves away from them during a sensitive period in the first few hours after the
    10·1 answer
  • The time it takes two successive crests of an ocean wave to pass a given point is called a _____.
    8·2 answers
  • What is the amount of heat, in Sl units, necessary to melt 1 lb of ice?
    5·1 answer
  • An electron is moving at a speed of 4.8 × 10 6 m/s at an angle of 30.0° with respect to a uniform magnetic field of 9.2 × 10 –4
    6·1 answer
  • I need this question's answer lo long define rest <br>​
    6·1 answer
  • A year on earth is 365 .26 long a year on Saturn last over 29 times longer than earth which of the following best explains this
    13·1 answer
  • An ideal pendulum is often discussed when studying simple harmonic motion. What are the conditions needed for an ideal pendulum?
    10·2 answers
  • A stationary charge is located between the poles of a horseshoe magnet. Is a magnetic force excerted of the charge? why?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!