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
iogann1982 [59]
10 months ago
7

In each part calculate the kinetic energy of the given objects in joules a) an automobile whose mass is 1260kg moving at a speed

of 66.3km/h b) a runner whose mass is 64.7 kg, moving at a speed of 8.52m/s c) an electron (mass 9.11x10^31kg) moving at a speed of 2.74x10^7m/s
Physics
1 answer:
Contact [7]10 months ago
5 0

a)

Kinetic energy (KE) = 1/2 m v^2

Where:

m = mass = 1260 kg

v = speed = 66.3 km/h = 18.42 m/s

Replacing:

KE = 1/2 (1260 kg ) (18.42 m/s )^2 = 213,756.7 J

You might be interested in
In what phase change do molecules completely overcome the intermolecular
Anika [276]
(B.) I know it’s not that hard or easy so don’t be made if wrong
8 0
2 years ago
Which moon has a thick atmosphere made mostly of nitrogen?
Delicious77 [7]
the answer is Titan
explanation: titan fascinates scientists because of its thick atmosphere — which is mostly made of nitrogen gas
7 0
2 years ago
A piston above liquid in a closed container has an area of 1m2. The piston carries a load of 350 kg. What will be the external p
grandymaker [24]
<span>Pressure = force / area</span>

I assume that 350kg is the mass 
Therefore, 

350 x 9.8 (gravity) = 3430N

3430 / 1 = 3430Pa

3.43 KPa


5 0
3 years ago
Read 2 more answers
Tarzan swings on a 31.0 m long vine initially inclined at an angle of 36.0◦ with the vertical. The acceleration of gravity if 9.
Gennadij [26K]

Answer:

v=10.777m/s

Explanation:

Tarzan swing can be thought of as change in potential energy by going from higher location We solve for height of beginning of the swing by using simple cosine equation:

So

31Cos36=25.08\\E_{potential}=mgh\\

ΔE=mg(h₂-h₁)

=m*9.81(31-25.08)\\

The potential energy of Tarzan initial position is converted into kinetic energy of his swing.By using kinetic equation

E_{kinectic}=P_{potential}\\1/2mv^{2}=m*9.81(31.0-25.08)\\(1/2)v^{2}=9.81(31.0-25.08)\\0.5v^{2}=58.07\\v^{2}=58.07/0.5\\v=\sqrt{58.07/0.5}\\ v=10.777m/s    

8 0
3 years ago
Since friction is a force,<br> what unit is friction<br> measured In???
dimaraw [331]
It would be measured in newtons :)
4 0
2 years ago
Read 2 more answers
Other questions:
  • A trapeze artist on a rope is momentarily held to one side by a partner on a platform The rope makes an angle of 26.0 with the v
    9·1 answer
  • An environmental group wants to sink a ship off the coast to create an artificial reef. They find that they must get a permit fr
    9·2 answers
  • Bicyclists in the Tour de France do enormous amounts of work during a race. For example, the average power per kilogram generate
    10·1 answer
  • Two identical blocks are connected to opposite ends of a compressed spring. the blocks initially slide together on a frictionles
    5·1 answer
  • Match the properties with the subatomic particles
    10·1 answer
  • Hi, I need help with this! I'll give five stars and thanks to all the helpful answers! I need five examples of events causing we
    8·1 answer
  • Charged particles posses a region of influence also called a (an)
    7·1 answer
  • A stone of mass m is thrown upward at a 30? angle to the horizontal. At the instant the stone reaches its highest point, why is
    8·2 answers
  • A good example of kinetic energy would be_____.
    7·1 answer
  • Can any one give me a good egg drop design that is over 500 grams?​
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!