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
prohojiy [21]
3 years ago
9

Three cars (car F, car G, and car H) are moving with the same speed and slam on their brakes. The most massive car is car F, and

the least massive is car H. If the tires of all three cars have identical coefficients of kinetic friction with the road surface, which car travels the longest distance to skid to a stop?
Physics
1 answer:
Crazy boy [7]3 years ago
3 0

To solve this problem it is necessary to apply the concepts related to Normal Force, frictional force, kinematic equations of motion and Newton's second law.

From the kinematic equations of motion we know that the relationship of acceleration, velocity and distance is given by

v_f^2=v_i^2+2ax

Where,

v_f = Final velocity

v_i = Initial Velocity

a = Acceleration

x = Displacement

Acceleration can be expressed in terms of the drag coefficient by means of

F_f = \mu_k (mg)  \rightarrowFrictional Force

F = ma \rightarrow Force by Newton's second Law

Where,

m = mass

a= acceleration

\mu_k = Kinetic frictional coefficient

g = Gravity

Equating both equation we have that

F_f = F

\mu_k mg=ma

a = \mu_k g

Therefore,

v_f^2=v_i^2+2ax

0=v_i^2+2(\mu_k g)x

Re-arrange to find x,

x = \frac{v_i^2}{2(-\mu_k g)}

The distance traveled by the car depends on the coefficient of kinetic friction, acceleration due to gravity and initial velocity, therefore the three cars will stop at the same distance.

You might be interested in
Find a numerical value for rhoearth, the average density of the earth in kilograms per cubic meter. Use 6378km for the radius of
mylen [45]

Answer:

density = 5520 kg/m^3

Explanation:

given that

radius of earth = 6378 km

G = 6.67 x 10⁻¹¹ m³/kg.s²

g = 9.80 m/s²

we know,

g = \dfrac{GM}{r^2}

mass of earth

M = \dfrac{gr^2}{G}

M = \dfrac{9.8 \times (6378 \times 10^3)^2}{6.67 \times 10^{-11}}

M = 5.972 x 10²⁴ kg

density =\dfrac{mass}{volume}

V = volume of the earth = 4/3πr³

V = 4/3 x 3.14 x (6378  x 10³)³

V = 1.08 x 10²¹ m³

density = \dfrac{5.972\times 10^{24}}{1.08\times 10^{21}}

density = 5.52 x 10³  kg/m^3

density = 5520 kg/m^3

8 0
3 years ago
A pair of toy freight cars, one twice the mass of the other, fly apart when a compressed spring that joins them is released. Acc
saul85 [17]

Answer:

greater acceleration is experienced by the car with lower mass

Explanation:

Since both the toys are connected by same spring so the force due to spring on both the toys will be same and it is given as

F = kx

now we know by Newton's II law

F = ma

so here we have

a = \frac{F}{m}

here we have same force on both the blocks

so acceleration will be more if mass is less

so greater acceleration is experienced by the car with lower mass

8 0
3 years ago
Consider a Cassegrain-focus, reflecting telescope. Images recorded at Cassegrain-focus will be:
Contact [7]
B. Flipped compared to what is in the sky
3 0
3 years ago
What is the economic application of change of state
Musya8 [376]
It is based on their state like population, literacy and poverty it varies from state to state, country to country
7 0
2 years ago
Where does the majority of the mass of an atom come from
asambeis [7]

Answer:

The Nucleus

Explanation:

The nucleus contains the majority of an atom's mass because protons and neutrons are much heavier than electrons, whereas electrons occupy almost all of an atom's volume.  I hope this helps you :D

5 0
2 years ago
Read 2 more answers
Other questions:
  • If your a member of the u.s. navy your organization is part of the department of what?
    15·1 answer
  • A large crate is suspended from the end of a vertical rope. Is the tension in the rope greater when the crate is at rest or when
    9·1 answer
  • This is a model of a Chlorine atom. How likely is it that this atom would want to bond with another atom? Chlorine atom Question
    13·1 answer
  • Question 14 of 30
    10·2 answers
  • Gas A has molecules with small mass. Gas B has molecules with larger mass. They are at the same temperature.
    14·1 answer
  • The 68-kg crate is stationary when the force P is applied. Determine the resulting acceleration of the crate if (a) P = 0, (b) P
    5·1 answer
  • The student moves his leg 34 cm sideways as shown.
    7·2 answers
  • Light waves that cross from an air medium to a water medium will
    12·1 answer
  • A person is trying to ride a bike all the way round the inside of a pipe for a stunt in a film. The filmmaker wants to know what
    8·1 answer
  • Rubbing your hands together warms them by converting work into thermal energy. If a woman rubs her hands back and forth, she gen
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!