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
inn [45]
3 years ago
5

A person drives an automobile with a mass of 450 kilograms at a velocity of 26 meters per second. The driver accelerates to a ve

locity of 30 meters per second. The difference in the automobile’s kinetic energy between the two velocities is joules. You may use the calculator.
Physics
1 answer:
gregori [183]3 years ago
7 0

Ec₁=mv₁²/2=450*26²/2=225*676=152100 J

Ec₂=mv₂²/2=450*30²/2=225*900=202500 J

ΔEc=Ec₂-Ec₁=202500-152100=50.4 kJ

You might be interested in
A particle moves according to the equation x = 11t^2, where x is in meters and t is in seconds.
Savatey [412]
We are given the equation:

<span>x = 11t^2
</span>
We use that equation to calculate for the distance traveled.
For (a)

At t=2.20 sec,    
                             x =53.24 meters

At t=2.95 sec,   
                             x =95.73 meters

Velocity = (95.73 meters - 53.24<span> meters) / (2.95 s - 2.20 s )  = 56.65 m/s

</span>For (b)

At t=2.20 sec,    
                             x =53.24 meters

At t=2.40 sec,   
                             x =63.36 meters

Velocity = (63.36 meters - 53.24<span> meters) / (2.40 s - 2.20 s )  = 50.6 m/s</span>
4 0
3 years ago
What must be the units for the gravitational constant G in order for gravitational force to have units of newtons?
babunello [35]

Answer:

m³/(kg⋅s²)

Explanation:

Hello.

In this case, since the involved formula is:

F=G*\frac{m_1m_2}{r^2}

By writing a dimensional analysis with the proper algebra handling, we obtain:

N[=]G*\frac{kg*kg}{m^2}\\ \\kg*\frac{m}{s^2}[=]G *\frac{kg*kg}{m^2}\\\\G[=]\frac{kg*m*m^2}{kg^2*s^2}\\ \\G[=]\frac{m^3}{kg*s^2}

Thus, answer is:

m³/(kg⋅s²)

Note that the [=] is used to indicate the units of G.

Best regards

4 0
3 years ago
What is the difference between air resistance and friction? ​
Vladimir [108]

Answer:Friction is a force that opposes the motion of objects; friction can cause objects to slow down. Air resistance is a type of friction. Air resistance causes moving objects to slow down. Different physical properties, such as the shape of an object, affect the air resistance on an object.

Explanation:

5 0
1 year ago
I need help with this question really urgent
Verizon [17]

Answer:

Cost Per Hour:

132.0000

Cost Per Day:

39600.0000

Cost Per Month:

1204632.00

Cost Per Year:

14455584.00

kWh Per Day:

3600.00

5 0
3 years ago
What is yo main vein call????
mariarad [96]
Artery im pretty sure 
7 0
3 years ago
Read 2 more answers
Other questions:
  • If the diameter of the red marble is 3.0 cm, and by using the formula for volume, what is a good approximation of its volume? cm
    14·1 answer
  • NEED THIS ANSWERED ASAP!!!! IN MIDDLE OF TEST RN HELP PLZ
    9·2 answers
  • How much force is needed to stop a 90-kg soccer player if he decelerates at 15 m/s^2?
    12·1 answer
  • If you detected radio signals with an average wavelength of 67 cm and suspected that they came from a civilization on a distant
    13·1 answer
  • The medical model of abnormality states that psychological disorders are __________.
    11·2 answers
  • Which of these equations will you used to find the final velocity if the initial
    13·1 answer
  • Why apple fall neuton head now gravity scary :(. gib me good answer im sad D:
    5·1 answer
  • A 100-watt lightbulb radiates energy at a rate of 100 J/s. (The watt, a unit of power, or energy over time, is defined as 1 J/s.
    15·1 answer
  • What part of the atom takes up most of the atoms space?
    10·2 answers
  • Which of the following would produce the most power?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!