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
Marat540 [252]
3 years ago
11

A car initially traveling at 32.4 m/s undergoes a constant negative acceleration of magnitude 1.70 m/s2 after its brakes are app

lied. (a) How many revolutions does each tire make before the car comes to a stop, assuming the car does not skid and the tires have radii of 0.330 m?
Physics
1 answer:
8090 [49]3 years ago
8 0
<h2>The car tire makes 149 revolutions before coming to stop.</h2>

Explanation:

a) We have equation of motion v² = u² + 2as

Initial velocity, u = 32.4 m/s  

Acceleration, a = -1.70 m/s²  

Final velocity, v = 0 m/s  

Substituting  

v² = u² + 2as

0² = 32.4² + 2 x -1.70 x s

s = 308.75 m  

Distance traveled before stopping is 308.75 m

Radius of tire = 0.330 m

Circumference of tire = 2πx 0.33 = 2.07 m

1 revolution = 2.07 m

\texttt{Number of revolutions = }\frac{308.75}{2.07}=148.91

The car tire makes 149 revolutions before coming to stop.

You might be interested in
A package is dropped from a helicopter moving upward at 15 m/s. If it takes 16.0 s before the package hits the ground, how high
Lelu [443]

Answer:

The package was released at a height of 1015.296 meters.

Explanation:

The package is dropped at an initial velocity different of zero, decelerated and later accelerated by gravity. Let assume that final height is equal to zero, the final height is given by the following equation of motion:

y = y_{o} + v_{o}\cdot t + \frac{1}{2}\cdot g \cdot t^{2}

Where:

v_{o} - Initial velocity, measured in meters per second.

y - Final height, measured in meters.

y_{o} - Initial height, measured in meters.

t - Time, measured in seconds.

g - Gravitational constant, measured in meters per square second.

(Positive sign - Package is moving upward, Negative sign - Package is moving downward)

The initial height is now cleared:

y_{o} = y - v_{o}\cdot t - \frac{1}{2}\cdot g \cdot t^{2}

Given that y = 0\,m, v_{o} = 15\,\frac{m}{s}, g = -9.807\,\frac{m}{s^{2}} and t = 16\,s, the final height of the package is:

y_{o} = 0\,m - \left(15\,\frac{m}{s} \right)\cdot (16\,s) - \frac{1}{2}\cdot \left(-9.807\,\frac{m}{s^{2}} \right) \cdot (16\,s)^{2}

y_{o} = 1015.296\,m

The package was released at a height of 1015.296 meters.

7 0
3 years ago
A jumbo jet of mass 100,000 kg during takeoff experience a thrust for each of its four engines of 50,000 N. producing an acceler
PtichkaEL [24]

Answer:

F=MA

5OOOO=100000×A

50000/100000=A

A=5/10 M/ S SQ

A=0.5 M/S SQ.

8 0
3 years ago
Describe how water molecules do not travel with the wave and the transfer of energy in water waves.
abruzzese [7]
The water molecules only oscillate up and down and not across the wave as water waves are transverse waves. Thus, the oscillations of the particles are perpendicular to the direction of wave propagation.
6 0
3 years ago
A 85.0kg man and a 65, 0kg woman are riding a Ferris wheel with a radius of 20.0m. What is the Ferris wheels tangential velocity
zvonat [6]

Answer:

The Ferris wheel's tangential (linear) velocity if the net centripetal force on the woman is 115 N is <u>3.92 m/s</u>.

Explanation:

Let's use <u>Newton's 2nd Law</u> to help solve this problem.

  • F = ma

The force acting on the Ferris wheel is the centripetal force, given in the problem: F_c=115 \ \text{N}.

The mass "m" is the <u>sum</u> of the man and woman's masses: 85+65= 150 \ \text{kg}.

The acceleration is the centripetal acceleration of the Ferris wheel: a_c=\displaystyle \frac{v^2}{r}.

Let's write an equation and solve for "v", the tangential (linear) acceleration.

  • \displaystyle 115=m(\frac{v^2}{r} )
  • \displaystyle 115 = (85+65)(\frac{v^2}{20})
  • \displaystyle 115=150(\frac{v^2}{20} )
  • .766667=\displaystyle(\frac{v^2}{20} )
  • 15.\overline{3}=v^2
  • v=3.9158

The Ferris wheel's tangential velocity is 3.92 m/s.

8 0
2 years ago
The colors of light that televisions primarily use to make a picture are ______________.
Bumek [7]

Answer:

Red, Green, and Blue

Explanation:

Each of the pixels on a computer monitor or TV screen is composed of phosphors surrounded by a black mask. The different colors we see are results from different combinations and intensities of these three primary colors (Red, Green, and Blue).

3 0
3 years ago
Read 2 more answers
Other questions:
  • What can you infer from the fact that although CFC's have been banned, refrigerators and aerosol cans are still being sold?
    13·2 answers
  • Sound is an example of ?
    14·2 answers
  • A jack for a car requires a force of 120 lbs to lift a 3,000 lb car. what is the ratio of the cars weight to the force required
    15·1 answer
  • A space with an absolute pressure less than one atmosphere may be considered?
    13·1 answer
  • (MC) What is the result of the Sun's light being refracted when it is high in the sky around noon?
    9·2 answers
  • Which parts of a compound microscope magnify objects? a convex and a concave lens two convex lenses two concave lenses one conca
    9·2 answers
  • The micturition reflex can be voluntarily controlled by the
    8·1 answer
  • Removing resistant transfer wires from a complete circuit will
    8·2 answers
  • What is the amplitude and wavelength of the wave shown below?
    8·1 answer
  • Correct answer gets marked brainly
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!