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
Leya [2.2K]
2 years ago
5

How far does a car travel in 30.0 s while its velocity is changing from 50.0 km/h to 80.0 km/h at a uniform rate of acceleration

?
Physics
1 answer:
pochemuha2 years ago
7 0

Answer:

v = u + a t

80 = 50 + a * 30

80 - 50 /30 = a

a = 30/30 = 1 m /s 2

s = u t + 1/2 at ^2

s = 50 * 30 + 1/2 * 1 * 30^2

s = 1500 + 1/2 * 900

s = 1500 + 450

s = 1950 m

You might be interested in
An Alaskan rescue plane traveling 41 m/s drops a package of emergency rations from a height of 192 m to a stranded party of expl
svet-max [94.6K]

Answer:

a)The package strikes 256.2 m in the ground relative to the point directly below where it was released

b) The horizontal component will not change it remains same as 41 m/s

c) Vertical component of velocity = 61.41 m/s

Explanation:

a) Consider the vertical motion of plane,

         We have equation of motion, s = ut + 0.5 at²

         Initial velocity, u = 0 m/s

         Displacement, s = 192 m

         Acceleration, a = 9.81 m/s²

         Substituting

                      s = ut + 0.5 at²

                      192 = 0 x t + 0.5 x 9.81 x t²

                         t = 6.26 seconds

         Now we need to find horizontal distance traveled in 6.26 seconds by the package.

         We have equation of motion, s = ut + 0.5 at²

         Initial velocity, u = 41 m/s

        Time, t = 6.26 s

         Acceleration, a = 0 m/s²

         Substituting

                      s = ut + 0.5 at²

                      s = 41 x 6.26 + 0.5 x 0 x 6.26²

                         s = 256.52 m

     The package strikes 256.2 m in the ground relative to the point directly below where it was released

b) The horizontal component will not change it remains same as 41 m/s

c) We have equation of motion, v = u+ at

          Initial velocity, u = 0 m/s

         Time, t = 6.26 s

         Acceleration, a = 9.81 m/s²  

         Substituting

                      v = u+ at

                       v = 0 + 9.81 x 6.26 = 61.41 m/s

   Vertical component of velocity = 61.41 m/s      

4 0
3 years ago
Which of the following is the best explanation for acceleration? *
Anuta_ua [19.1K]

Answer:the rate of change in velocity

Explanation: acceleration =the change in velocity / time taken the unit is m/s2

While velocity is the distance traveled in a given direction/time taken.the unit is m/s

8 0
3 years ago
Comparing X-ray to radio wave, which has a shorter wavelength?
Daniel [21]

Answer:

x-ray

Explanation:

X-rays can penetrate through matter because of their high frequencies while radio waves are not able to do so as much. If you think about it, taking an x-ray requires a lot more energy than for radio waves to allow you to listen to songs on the radio. Hope this helps :)

6 0
3 years ago
if the mass of the objects stays the same and their distance from eachother decreases, then the force of gravity between the two
dedylja [7]
Then the force of gravity between them would be quadrupled and so on but the gravitational force is inversely proportional to the square of the separation distance between the two interacting objects which makes more separation distance will result in weaker gravitational forces
5 0
1 year ago
Which of these would most likely cause a sound wave?
Levart [38]
Among the choices the one that most likely cause a sound wave is C or the a spoon hitting the side of a bowl while mixing <span>because that's going to make a sound.

Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions.
</span>
6 0
3 years ago
Read 2 more answers
Other questions:
  • Which statement represents a healthy choice for a pregnant woman? A mother eats twice as much to support her growing fetus. A mo
    6·2 answers
  • Electrons are important to electric current because they are able to__________.
    11·2 answers
  • Balance the following equation Fe203+HCL fecl3+H20
    8·1 answer
  • From Kepler's third law, an asteroid with an orbital period of 8 years lies at an average distance from the Sun equal to From Ke
    12·1 answer
  • If you went to a planet that had the twice the radius as Earth, but the same mass, a 1 kg pineapple would have a weight of
    10·1 answer
  • Can someone help with these/
    8·1 answer
  • Our Milky Way galaxy is 100,000 ly in diameter. A spaceship crossing the galaxy measures the galaxy's diameter to be a mere 1 ly
    9·1 answer
  • Where does the rest of the energy 90% go?
    6·1 answer
  • List 5 reason why water is not thermometric liquid​
    5·1 answer
  • What's the difference between coplanar forces and resultant forces?​
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!