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
maks197457 [2]
3 years ago
11

Calculate the kinetic energy in joules of a 1200 kg automobile moving at 18 m/s .

Physics
2 answers:
vodka [1.7K]3 years ago
7 0

Answer:

194,400 joules of kinetic energy.

Explanation:

Remember that to calculate the Kinetic energy you need to use the next formula:

Ke=\frac{1}{2}Mass*Velocity^2

We know that Mass= 1200 kg and velocity is 18m/s, so we insert those values into the formula:

Ke=\frac{1}{2}Mass*Velocity^2\\Ke=\frac{1}{2}1200kg*(18m/s)^2\\Ke=194,400 joules

So the kinetic energy of a car moving at 18m/s with a mass of 1200 kg would be 194,400 joules.

Marta_Voda [28]3 years ago
6 0
1/2(mass)(velocity)^2= has 194,400 Joules of Kinetic Energy
You might be interested in
Determine the magnitude of the current flowing through a 4.7 kilo ohms resistor if the voltage across it is (a) 1mV (b) 10 V (c)
mariarad [96]

Answer:

213 nA

2.13 mA

851e^-t μA

Explanation:

We have a pretty straightforward question here.

Ohms Law states that the current in an electric circuit is directly proportional to the voltage and inversely proportional to the resistance in the circuit. It is mathematically written as

V = IR, since we need I, we can write that

I = V/R

a) at V = 1 mV

I = (1 * 10^-3) / 4.7 * 10^3

I = 2.13 * 10^-7 A or 213 nA

b) at V = 10 V

I = 10 / 4.7 * 10^3

I = 0.00213 A or 2.13 mA

c) at V = 4e^-t

I = 4e^-t / 4.7 * 10^3

I = 0.000851e^-t A or 851e^-t μA

5 0
2 years ago
a 230 kg roller coaster reaches the top of the steepest hill with a speed of 6.2 km/h. It then descends the hill, which is at an
igor_vitrenko [27]

Answer: 81.619 kJ

Explanation:

Given

Mass of roller coaster is m=230\ kg

It reaches the steepest hill with speed of u=6.2\ km/h\ or \ 1.72\ m/s

Hill to bottom is 51 m long with inclination of 45^{\circ}

Height of the hill is h=51\sin 45^{\circ}=36.06\ m

Conserving energy to get kinetic energy at bottom

Energy at top=Energy at bottom

\Rightarrow K_t+U_t=K_b+U_b\\\Rightarrow \dfrac{1}{2}mu^2+mgh=K_b+0\\\\\Rightarrow K_b=0.5\times 230\times 1.72^2+230\times 9.8\times 36.06\\\Rightarrow K_b=340.216+81,279.24\\\Rightarrow K_b=81,619.456\ J\\\Rightarrow K_b=81.619\ kJ

8 0
3 years ago
____________occurs when an object travels in a curved path.
labwork [276]

Answer:

Acceleration

Explanation:

can you mark me  brainlies

So, if an object travels in a curved path, it changes velocity, and, thus, accelerates. This acceleration must be tied to a force. ... Therefore, whenever an object travels in a curved path, there must be an unbalanced force acting upon it. It is important to understand that all this may occur without a change in speed.t

4 0
3 years ago
A skater makes one revolution per second, f = w/(2p) = 1, with her arms and leg stretched (left). By lowering her leg and bringi
Firlakuza [10]

Answer:

Answer is given in the attachment.

Explanation:

Download pdf
4 0
3 years ago
Read 2 more answers
How does Mr. Anderson define solubility in the video?
VikaD [51]

Answer:

7.3

Explanation:

4 0
3 years ago
Other questions:
  • Identify the basic structure of a chemical equation
    5·1 answer
  • Monochromatic light falls on two very narrow slits 0.048 mm apart. successive fringes on a screen 5.00 m away are 6.5 cm apart n
    12·1 answer
  • 2NaOH + H2SO4 → Na2SO4 + H2O
    7·2 answers
  • The temp of some water with a mass of 10.0 g and a specific heat of 4.2 changed from 25.0 ' C to 35.0 ' C. How much heat was abs
    5·2 answers
  • Which electromagnetic waves have the shortest wavelength and the highest frequency? _________ waves
    8·2 answers
  • Five multiple choice science questions.
    12·1 answer
  • What is the most likely reason that horses and mountain goats have hooves?
    13·2 answers
  • Answer this plzzzzzzzzzzzzz
    8·1 answer
  • 5.Noise pollution is harmful forRequired to answer. Single choice.Immersive Reader
    11·1 answer
  • Adam takes a bus on a school field trip. The bus route is split into the five legs listed in the table. Find the average velocit
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!