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
Mademuasel [1]
3 years ago
11

A 1451 kg car is traveling at 48.0 km/h. How much kinetic energy does it possess? K.E. =

Physics
1 answer:
jarptica [38.1K]3 years ago
8 0

           Kinetic energy  =  (1/2) (mass) (speed)²

BUT . . . in order to use this equation just the way it's written,
the speed has to be in meters per second.  So we'll have to
make that conversion.

        KE  =  (1/2) · (1,451 kg) · (48 km/hr)² · (1000 m/km)² · (1 hr/3,600 sec)²

               =  (725.5) · (48 · 1000 · 1 / 3,600)²  (kg) · (km·m·hr / hr·km·sec)²

               =  (725.5) · ( 40/3 )²  ·  ( kg·m² / sec²)

               =    128,978  joules  (rounded)
You might be interested in
Suponga que usted pone en contacto 2 cuerpos, uno con carga +6 y otro con carga -8. ¿Con qué carga queda cada uno al final?
soldi70 [24.7K]
What is the question?
4 0
3 years ago
An ellipse has two focal points. One of the focal points is the _____. earth, moon, or Sun
Rasek [7]

An ellipse has two focal points. One of the focal points is the <u><em>Sun</em></u>.

Because they planets move faster when they are around the sun.

6 0
3 years ago
Read 2 more answers
.
bija089 [108]

Cathode rays are negatively charged

Explanation:

Thomson's cathode ray beam bent towards the positively charged plate. With this information, he was able to conclude that the rays were negatively charged.

Cathode rays were discovered by J.J. Thomson based on his experiment on the gas discharge tube. He was able to discover some of the properties of the wave.

One notable one was that he observed that the rays deflected towards the positively charged plate.

Since unlike poles attract then he concluded that the cathode rays were negatively charged.

learn more:

Rutherford brainly.com/question/1859083

#learnwithBrainly

6 0
3 years ago
A water balloon is thrown at an angle of 30° with a velocity of 40 m/s. How long do you have to move out of the way if the ballo
boyakko [2]

Answer:

t=0.58s

Explanation:

We can consider only the horizontal component since the horizontal component of the velocity is constant (v_x=vcos\theta), and we want to know how much time it takes for the balloon to travel a horizontal distance d_x at that speed. The definition of (horizontal) velocity is v_x=\frac{d_x}{t}, so we have:

t=\frac{d_x}{v_x}=\frac{d_x}{vcos\theta}=\frac{(20m)}{(40m/s)cos(30^{\circ})}=0.58s

6 0
3 years ago
The acceleration of gravity on the earth is 9.80 m/s 2. If a person weighs 335 N, what is his/her mass?
padilas [110]

Answer:

About 34.18kg

Explanation:

Using F=ma, you know that the force that an object exerts can be found by multiplying the mass and the acceleration. Therefore, you can find the mass with the formula m=\dfrac{F}{a}. Plugging in the values you were given, m=\dfrac{335}{9.80}\approx 34.18kg. Hope this helps!

5 0
3 years ago
Other questions:
  • Please help me please<br>​
    10·1 answer
  • An airplanes flies 2220 miles in 3. What is it’s average speed in miles per hour?
    14·2 answers
  • 1) ________ is a force that you can fell with your feet
    13·1 answer
  • What is the answer to 17 ‐ 12× ‐ 18 ‐ 5×
    15·1 answer
  • When you are on a roller coaster, you are constantly transforming from Potential to Kinetic energy and back. Explain how these e
    6·1 answer
  • Which of the following statements would NOT result in an eclipse? a. The Earth is positioned directly between the Sun and the Mo
    12·1 answer
  • Which is developed during the process of technology design
    5·1 answer
  • A small block of mass m1 = 0.4 kg is placed on a long slab of mass m2 = 2.8 kg. Initially, the slab is stationary and the block
    13·1 answer
  • Two blocks with a mass of 2 kg collide in an elastic collision. The initial velocity of Block 1 is 10 m/s. Block 2 is traveling
    10·1 answer
  • Physics and chemistry is the study of what? ​
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!