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
SashulF [63]
3 years ago
15

Rafael is driving his car at 26 m/s. What is the shortest distance in which he can brake and stop if the coefficient of static f

riction between the tires and the road is 0.4
Physics
1 answer:
Hitman42 [59]3 years ago
4 0

Answer:

86.14 meters.

Explanation:

Step one:

Given data

velocity of car = 26 m/s

the coefficient of static friction between the tires and the road

µ = 0.4 (kinetic)

Let us take g = 9.81 m/s^2

Required

The distance x = distance in m

We know that

N = Fg = mg\\\\F_\mu  = -\mu N = \mu F_g = \mu mg\\\\KE = (1/2) mv^2

W = F*x  (Work is force times distance)

Step two:

Conservation of energy gives  

KE = W

Substituting gives  

(1/2) mv^2 = F \mu x\\\\(1/2) mv^2 = \mu mgx\\\\mv^2 = 2 \mu mgx

Solving for distance (x) gives  

x = mv^2  / 2 \mu mg

Simplifying

x = v^2 / 2 \mu g

Substitute:  

x = v^2 / 2 \mu g

x= 26^2/2*0.4*9.81

x=676/7.848\\\\x=86.14

Therefore, the minimum braking distance is 86.14 meters.

You might be interested in
How long would it take a leopard, running at an average speed of 20 m/s to travel 500 m?
alexandr1967 [171]

Answer:

25 seconds

Explanation:

500/20

4 0
2 years ago
In nature, where do fusion reactions take place?
hjlf
Fusion reactions happen in stars 
3 0
2 years ago
Read 2 more answers
Why is a virus NOT classified as a living thing?
Shkiper50 [21]

The correct answer would be B. A virus is living BUT   however it does NOT have all of the 7 characteristics of life.

Hope that helped ^^

4 0
3 years ago
Read 2 more answers
An electron is a particle with a ____.
Dahasolnce [82]

A beta particle. Hoped I help. Sorry if it wrong.

4 0
3 years ago
Read 2 more answers
Hi guys <br> I suggest to make group to exchange the informations if they need add their name here
sveticcg [70]
??


what’s the question
8 0
2 years ago
Read 2 more answers
Other questions:
  • Pls answer these questions I beg u!! And use the diagram for answering the questions pls help!! I will make u the BRAINLIEST!!!
    6·1 answer
  • What is a difference between a law and a hypothesis?
    6·1 answer
  • Lamar writes several equations trying to better understand potential energy. What conclusion is best supported by Lamar’s work?
    12·2 answers
  • In which of these ways can volcanoes help build up land?
    7·1 answer
  • A 50 mL graduated cylinder contains 25.0 mL of water. A 42.5040 g piece of gold is placed in the graduated cylinder and the wate
    6·1 answer
  • Explain what happens to the energy in a group in a system if one object loses energy according to the Law of Conservation of Ene
    13·1 answer
  • Suppose that the Hubble Space Telescope discovers a series of planets with the following characteristics moving around a star th
    11·1 answer
  • Prefix and suffix for hydrology
    6·1 answer
  • An object is weighed at different locations on the
    11·2 answers
  • Explain the basic reason of conduction of an electric current through a conductor.​
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!