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
ra1l [238]
2 years ago
7

A 920-kg compact car moving at 92 m/s has approximately 3,893,440 Joules of kinetic energy. What is the change in kinetic energy

if it is moving at 36 m/s?
Physics
1 answer:
tensa zangetsu [6.8K]2 years ago
3 0

Answer:

Change in kinetic energy = 3297280 J

Explanation:

Given that,

Mass, m = 920 kg

Speed of a car, v = 92 m/s

Kinetic energy, K = 3,893,440 J

If the speed of a car, V = 36 m/s

Net kinetic energy is given by :

K_n=\dfrac{1}{2}mV^2\\\\=\dfrac{1}{2}\times 920\times (36)^2\\\\K_n=596160\ J

The change in kinetic energy = 3,893,440 - 596160

= 3297280 J

So, the change in kinetic energy of the car is 3297280 J.

You might be interested in
Many scientists would argue that the reproductive system is the most important system in the body. Which of these would best def
Alchen [17]
Answer = A

Without reproduction humans would basically become extinct
4 0
3 years ago
Read 2 more answers
Which would deliver a greater change in momentum to an opponent’s body - a dodgeball that traveled at 10m/s and rebounded with a
Mazyrski [523]
2nd sentence seems bout right ?? i think
7 0
3 years ago
What does strong gravity mean?<br> PLZZZZZ HELP MEEEEEE
grigory [225]
<span>The force of attraction by which terrestrial bodies tend to fall toward the center of the earth strongly. If i'm wrong, correct me. otherwise i hope this helped.</span>
7 0
3 years ago
Read 2 more answers
What is the average power developed by a motor as it lifts a 400.-kilogram mass at constant speed through a vertical distance of
Tomtit [17]

Answer:

The average power developed by a motor is 4905 Watts.

Explanation:

The average power is given by:

P = \frac{W}{t}

Where:

W: is the work

t: is the time = 8.0 s

First, let's find the work:

W = F*d

Where:

F: is the force

d: is the displacement = 10.0 m

The force is in the vertical motion, and since the movement of the mass is at constant speed the force is:

F = mg = 400 kg*9.81 m/s^{2} = 3924 N

Hence, the average power is:

P = \frac{F*d}{t} = \frac{3924 N*10.0 m}{8.0 s} = 4905 J/s = 4905 W                    

Therefore, the average power developed by a motor is 4905 Watts.

I hope it helps you!                  

3 0
3 years ago
1. You have a cat who has a mass of 10 kg and is
disa [49]

Answer:

1) F = 100N

2) a = 2 m/s²

3) m = 25 kg

Explanation:

1) F = ma ( F = ?, m = 10 kg, a = 10 m/s² )

  F = 10×10

  F = 100 N

2) F = ma ( F = 20N, m = 10 kg, a = ? )

   20 = 10×a

   10a = 20

   a = 20/10

   a = 2 m/s²

3)F = ma ( F = 100N, m = ?, a = 4 m/s² )

  100 = m×4

  4m = 100

  m = 100/4

  m = 25 kg

Hope that helps! Good luck!

 

7 0
3 years ago
Other questions:
  • What is occurring when two waves traveling along the same medium meet and cancel each other out?
    5·1 answer
  • How can I change my Brainly username?
    5·2 answers
  • Light of wavelength 610 nm falls on a slit that is 3.50×10^−3 mm wide. How far the first bright diffraction fringe is from the s
    11·1 answer
  • A free-falling golf ball strikes the ground and exerts a force on it. Which sentences are true about this situation? A golf ball
    10·2 answers
  • One difference between a fundamental niche and a realized niche is that ___
    11·2 answers
  • 3. What conclusion would you draw if a seismogram from a particular seismic station showed only P waves?
    10·1 answer
  • Four charges are at the corners of a square centered at the origin as follows q at a a 2q at a a 3q at a a and 6q at a a A fifth
    13·1 answer
  • When spray is applied to a car, the paint has a negative charge and the surface of the car has a positive charge. Some processes
    8·1 answer
  • A wave travels at 1,500 m/s with a frequency of 5 hertz. What is its wavelength?
    11·1 answer
  • What effect does the time taken to lift the mass have on power output?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!