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
mamaluj [8]
3 years ago
9

The minimum stopping distance of a car moving at 20.5 mi/h is 11.6 m. Under the same conditions (so that the maximum braking for

ce is the same), what is the minimum stopping distance for 50.2 mi/h?
Physics
1 answer:
pshichka [43]3 years ago
7 0

Answer:

d = 69 .57 meter

Explanation:

First case

Speed of car ( v )  = 20.5 mi/h  = 9.164  M/S

distance ( d ) = 11.6 meter                                       ( m = mass of the car )

Work done = 0.5 m v²  = 0.5 * 9.164² * m J  = 41.99 m J

Force = ( workdone /distance ) = ( 41.99 m / 11.6 )   =  3.619 m N

Second case

v = 50.2 mi/h = 22.44135 m/s

d = ?

Work done = 0.5 * 22.44² * m J = 251.7768 * m J

Since the braking force remains the same .

3.619 m = ( 251.7768 m / d )

d = 69 .57 meter

You might be interested in
How does gravity work in space? Please help!​
vampirchik [111]

Answer:

gravityis an invisible force that pulls objects toward each other. So, the closer objects are to each other, the stronger their gravitational pull is. Earth's gravity comes from all its mass .

3 0
2 years ago
What is the mass of an object that is 6kg on a planet with an acceleration due to gravity
goldfiish [28.3K]

Answer:

Mass of the body will be = 6 kg

Explanation:

Given:

Mass of an object = 6 kg

Acceleration due to gravity of the planet = 10 m/s^2

To find the mass of the body on that planet.

Solution:

Mass of the body is defined as the total amount of matter contained in the body.

Thus, mass of a body will always remain constant irrespective of the acceleration due to gravity. This is because it is an independent quantity and does not vary with acceleration due to gravity.

<em>It is the weight of the body that changes with the change in the acceleration due to gravity as it is given by:</em>

W=mg

where m represents mass of the body and g represents the accelration due to gravity.

Hence, the mass of the given body will remain = 6 kg.

6 0
3 years ago
A 150 g baseball pitched at a speed of 45 m/s is hit straight back to the pitcher at a speed of 60 m/s. What is the magnitude of
abruzzese [7]

Answer:

The average force is 1578.94 N.

Explanation:

Given that,

Mass of baseball = 150 g

Speed = 45 m/s

Speed of pitcher = 60 m/s

Time = 9.5 ms

We need to calculate the average force

Using formula of impulse

J=\Delta p

J=m\Delta v...(I)

J=F\Delta t....(II)

From equation (I) and (II)

F=\dfrac{m(v_{f}-v_{i})}{\Delta t}

Where, m = mass of baseball

v_{f} = final velocity

v_{i} = Initial velocity

\Delta t = time

Put the value into the formula

F=\dfrac{150\times10^{-3}\times(60-(-40))}{9.5\times10^{-3}}

F=1578.94\ N

Hence, The average force is 1578.94 N.

3 0
4 years ago
Read 2 more answers
How and why does breathing rate increase during exercise
kondor19780726 [428]
<span>Your heart speeds up to pump extra food and oxygen to the muscles. Breathing speeds up to get more oxygen and to get rid of more carbon dioxide. When a fit person, such as an athlete, exercises the pulse rate, breathing rate and lactic acid levels rise much less than they do in an unfit person.
</span>
7 0
4 years ago
The two hot-air balloons in the drawing are 48.2 and 61.0 m above the ground. A person in the left balloon observes that the rig
Lynna [10]

Answer:

x = 54.15 meters between the balloons horizontally.

Explanation:

Hence, vertical distance between balloons is 12.8 meters.

y= 61-48.2  = 12.2 m

A right-angle triangle is formed with,

angle θ = 13.3 degrees

opposite (y) = 12.8

adjacent (x) = ?

tan\theta = \dfrac{y}{x}

Now by putting the values in the above equation.

tan13^{\circ}=\dfrac{12.8}{x}

x=\dfrac{12.8}{tan13^{\circ}}

x = 54.15 meters between the balloons horizontally.

8 0
3 years ago
Other questions:
  • I need help doing what the difference between the symbol and the number​
    15·1 answer
  • Which of these most closely describes the shape of a ellipse
    10·1 answer
  • Which of these statements best describes a scientific theory
    11·1 answer
  • A push or pull is called a force. Unbalanced forces can cause objects to move in many ways but not to move faster. B) move slowe
    14·1 answer
  • What is the electric field experienced by a charged balloon if the charge on the balloon is 9.4 × 10^-10 coulombs and the force
    7·1 answer
  • Which of the following is true for a parallel circuit?
    13·2 answers
  • A car passes point “A” and then 120 meters later. It’s velocity was measured 21 m/s. If it’s acceleration was constant at 0.853
    10·1 answer
  • An airplane flies horizontally at constant speed in a straight­line direction. Its state of motion is unchanging. In other words
    15·1 answer
  • Our sun is in which stage of its life cycle?
    11·2 answers
  • What is instantaneous speed nd velocity​
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!