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
TiliK225 [7]
3 years ago
7

A 2020 kg car traveling at 14.2 m/s collides with a 2940 kg car that is initally at rest at a stoplight. The cars stick together

and move 2.12 m before friction causes them to stop. Determine the coefficient of kinetic friction between the cars and the road, assuming that the negative acceleration is constant and all wheels on both cars lock at the time of impact.
Physics
1 answer:
velikii [3]3 years ago
4 0

Answer:

The answer is 3,064xe^{-4}

Explanation:

When the collision happens, the momentum of the first car is applied to the both of them.

So we can calculate the force that acts on both cars as:

  • The momentum of the first car is P = 2020 kg x 14.2 m/s = 28,684 kg.m/s
  • The acceleration of both cars after the crash is going to be a = P / mtotal which will give us a = 28,684 / (2020+2940) = 5.78 m/s
  • Since the second car was initially not moving, the final acceleration was calculated with the momentum of the first car.

Now we can find the force that acts on both of them by using the formula F = m.a which will give us the result as:

  • F = (2020+2940) x 5.78 = 28,684

The friction force acts in the opposite direction and if they stop after moving 2.12 meters;

  • Friction force is Ff = μ x N where μ is the friction coefficient and the N is the normal force which is (2020+2940) x 10 if we take gravitational force as 10, equals to 49,600.
  • F - Ffriction = m x V
  • 28,684 - μ x 49,600 = 4960 x 5.78
  • μ = 3,064xe^{-4}

You might be interested in
Tim observes that a force pulls him down when he jumps up in the air. Based on his observation, which conclusion is correct?
enyata [817]
Gravitational force is a non-contact force.
8 0
3 years ago
A chef sanitized a thermometer probe and then checked the temperature of minestrone soup being held in a hot-holding unit. the t
ss7ja [257]

Answer: Option (A) is the correct answer.

Explanation:

A corrective action is defined as the action with the help of which a person can avoid a difficulty or problem that he/she was facing earlier.

For example, when the chef checked the temperature of soup using thermometer then it was 120 but his operation's critical limit was 135.

So, to avoid this problem he heated the soup to 165 at 15 seconds following which he got the result as desired.

Therefore, reheating the soup was his corrective action.

Thus, we can conclude that reheating the soup was the corrective action.

4 0
3 years ago
If I bought 59 kids off the black market in a secret door in the stalls and I sell 21 kids then ask for 81 more then 12 off the
larisa [96]

You will be left with 106 kids

<h3>Meaning of word problem</h3>

A word problem can be defined as a mathematical problem that is written in word or written in a sentence format.

In a word problem, the student is expected to decode the sentence into a mathematical expression before solving

In conclusion, You will be left with 106 kids

Learn more about word problems: brainly.com/question/13818690

#SPJ1

5 0
2 years ago
The same wave travels for 2 seconds, what is its frequency?*
sveticcg [70]

Answer:

In waves distance is measured by wave length  and time is measured by frequency or period.

velocity ratio=wave length multiply by frequency.

HENCE, if the same wave travels for 2 econds its frequency will be 2Hz.

Explanation:

8 0
3 years ago
What kind of rock is this?
Katyanochek1 [597]
The picture is kinda blurry but it looks like granite which is metamorphic.
5 0
3 years ago
Read 2 more answers
Other questions:
  • Newton's law of universal gravitation states that every object in the universe attracts every other object. true or false.
    8·2 answers
  • A 50 kg pitcher throws a baseball with a mass of 0.15 kg. If the ball is thrown with a positive velocity of 35 m/s and there is
    7·1 answer
  • Why is the following situation impossible? Two identical dust particles of mass 1.00 µg are floating in empty space, far from an
    11·1 answer
  • How many nanoseconds does it take light to travel 1.00 ft in vacuum? (This result is a useful quantity to remember.)
    9·1 answer
  • Please help
    15·2 answers
  • The amplitude of a wave is
    10·1 answer
  • In order for a satellite to move in a stable circular orbit of radius 6588km at a constant speed, its centripetal acceleration m
    14·1 answer
  • What is the kinetic energy of a 24-kg mass that is moving with a velocity of 2 m/s?
    8·2 answers
  • If six moles of hydrogen chloride (HCl) react with plenty of aluminum, how many moles of aluminum chloride (AlCl3) will the reac
    5·1 answer
  • True or false I will mark brainless ​
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!