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
salantis [7]
3 years ago
14

A car slams on its brakes, coming to a complete stop in 4.0 s. The car was traveling south at 60.0 mph. Calculate the accelerati

on. mi/h/s
Physics
2 answers:
alexgriva [62]3 years ago
8 0

Answer:

The car is decelerating with the magnitude of 0.00416 mi/h².

Or

The car is decelerating with the magnitude of 15 mi/h/s.

Explanation:

Given that,

Time = 4.0 sec

Speed = 60.0 mph

We need to calculate the acceleration

Using equation of motion

v = u+at

Where, v = final speed

u = initial speed

a = acceleration

t = time

Put the value into the formula

a= \dfrac{v-u}{t}

a=\dfrac{0-60.0}{4.0\times3600}

a =-0.00416\ mi/h^2

We need to calculate the acceleration  in mi/h/s

a = \dfrac{60.0\ mph}{4.0\ s}

a= -15\ mi/h/s

Negative sign

Hence, The car is decelerating with the magnitude of 0.00416 mi/h².

Or

The car is decelerating with the magnitude of 15 mi/h/s.

lutik1710 [3]3 years ago
6 0
We need to apply the following expression

Vf = Vo + a.t

Where a is the acceleration
t is the time it takes to achieve Speed Vf
And Vo the initial speed 

In this problem Vo = 60 miles/hour
Vf =  0 (comes to a stop)
t = 4 seconds 

a = -60 [miles/hours] / 4 [s] = -15 miles/hour/second    (negative as it goes in                                                                                                  the opposite direction)
You might be interested in
an object is producing a sound that has a wavelength in air of 2.69m. If the speed of sound in air is 346m/s, what is the freque
Misha Larkins [42]

Answer:

129.74 Hz

Explanation:

Given:

Wave velocity ( v ) = 346 m / sec

wavelength ( λ ) = 2.69 m

We have to calculate Frequency ( f ) :

We know:

v = λ / t [ f = 1 / t ]

v = λ f

= > f = v / λ

Putting values here we get:

= > f = 346 / 2.69 Hz

= > f = 34600 / 269 Hz

= > f = 129.74 Hz

Hence, frequency of sound is 129.74 Hz.

5 0
3 years ago
If two objects move farther apart from one another, the force of gravity will
jonny [76]
Gravity is universal. This force of gravitational attraction is directly dependent upon the masses of both objects and inversely proportional to the square of the distance that separates their centers. This means that as you move away from an object the gravitational force decreases.
4 0
3 years ago
Read 2 more answers
In a charging process, 1 × 10^13 electrons are removed from one small metal sphere and placed on a second identical sphere. Init
liraira [26]

Answer:

r = 0.303m

= 30.3cm

Explanation:

Given that,

The number of electrons transferred from one sphere to the other,  

n  = 1 ×10 ¹³e le c t r o n s

The electrostatic potential energy between the spheres,  

U = − 0.061 J

The charge on an electron,  

q = − 1.6 × 10 ⁻¹⁹C

The coulomb constant,  

K = 8.98755 × 10 ⁹ N ⋅ m ² / C 2²

Due to the transfer of electrons, both spheres become equally and oppositely.

The charge gained by the sphere due to the excess of the electron is:  

q ₁ = n q

   = 1 ×10 ¹³ *  − 1.6 × 10 ⁻¹⁹

   = -1.6  × 10⁻⁶C

The charge left on the first sphere is =

q ₂ = -q₁ = 1.6  × 10⁻⁶C

The electric potential energy between two point charges is given by the following equation:

U = K q ₁q ₂/r

q ₁ and  q ₂ are the two charges.

r  is the distance between the charge and the point.

K  =  8.98755  ×  10 ⁹ N ⋅ m ² / C ²

we have:

-0.061 =  (8.98755  ×  10 ⁹ * (-1.6  × 10⁻⁶)²) / r

r = (18.41 ×  10 ⁻³) / 0.061

r = 0.303m

= 30.3cm

4 0
3 years ago
Is Racism Good or Bad? Why? (Explain)
k0ka [10]
Bad, it's bring more hatred to the world
3 0
3 years ago
Read 2 more answers
If you increase the distance by double the work will _____________
VMariaS [17]

Answer: the work will also increase by double

Explanation:

This is because they are directly proportional in the formula w=f x d

6 0
3 years ago
Other questions:
  • which of the following would not be taken into consideration when describing the quality of a sound? a. the number of the overto
    10·2 answers
  • Davina accelerates a box across a smooth frictionless horizontal surface over a displacement of 18.0 m with a constant 25.0 N fo
    8·1 answer
  • Eclipse of the sun occurs(A).When the moon is between the sun and the earth.(B).
    12·1 answer
  • You are working on charge-storage devices for a research center. Your goal is to store as much charge on a given device as possi
    5·1 answer
  • A total resistance of 3.03 Ω is to be produced by connecting an unknown resistance to a 12.18 Ω resistance. (a) What must be the
    13·1 answer
  • What are the effects of overpopulation on a specific species in an ecosystem?
    6·2 answers
  • Two similar waves X and Y travel through the same medium. Wave X has a frequency of 200 hertz and a
    11·1 answer
  • I need help please..its too complicated
    9·1 answer
  • A thundercloud has an electric charge of 48.8 C near the top of the cloud and –41.7 C near the bottom of the cloud. The magnitud
    11·1 answer
  • How does the meaning of the word isometric relate to determining if an isometric transformation occurred?.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!