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
harkovskaia [24]
3 years ago
5

A cell phone weighing 80 grams is flying through the air at 15 m/s what is the kinetic energy

Physics
1 answer:
hjlf3 years ago
3 0

Answer:

9\:\mathrm{J}

Explanation:

Kinetic energy is given by the following equation:

KE=\frac{1}{2}mv^2, where m is mass in \mathrm{kg} and v is velocity in \mathrm{m/s}.

Since the cell phone's mass is given in grams, we need to convert this into kilograms:

80\:\mathrm{g}\cdot \frac{1\:\mathrm{kg}}{1000\:\mathrm{g}}=0.08\:\mathrm{kg}.

Therefore, the kinetic energy of the cell phone is:

KE=\frac{1}{2}\cdot 0.08\cdot 15^2=\fbox{$9\:\mathrm{J}$}.

You might be interested in
Please help I need this its for a grade
irina1246 [14]

Which sentence from paragraph 4 most precisely explain the factors that determine the force of gravity?

  • <em>"</em><em> </em><em>In</em><em> </em><em>other</em><em> </em><em>words</em><em>,</em><em> </em><em>these</em><em> </em><em>equations</em><em> </em><em>states</em><em> </em><em>the</em><em> </em><em>gravitational</em><em> </em><em>force</em><em> </em><em>between</em><em> </em><em>two</em><em> </em><em>bodies</em><em> </em><em>is</em><em> </em><em>proportional</em><em> </em><em>to</em><em> </em><em>the</em><em> </em><em>product</em><em> </em><em>of</em><em> </em><em>their</em><em> </em><em>masses</em><em> </em><em>and</em><em> </em><em>inversely</em><em> </em><em>proportional</em><em> </em><em>to</em><em> </em><em>the</em><em> </em><em>square</em><em> </em><em>of</em><em> </em><em>the</em><em> </em><em>distance</em><em> </em><em>between</em><em> </em><em>them</em><em>.</em><em>"</em>

It's formula is g=GM/r²

4 0
3 years ago
Three rocks, each of varying mass and volume, are released from a window at the same time. The window is at height h above the g
d1i1m1o1n [39]
All three rocks will achieve the same speed
4 0
3 years ago
Why might it be helpful to us to measure gravity fluctuations on Earth? What is the most important type of information it gives
Anna [14]
I think it would be helpful to measure gravity so we know how it affects animals and plants and planes and spaceships and cars. I think the most important type of information it gives us is just like making sure people are safe and that there’s nothing we are going on or that the gravity increases at a rate or if it decreases just so we know how to handle it in the future and I think that information would be useful so we don’t die.
8 0
3 years ago
10 po
NISA [10]

By the Newtons Second Law:

F = ma

F = (47 kg)(15 m/s²)

<h2>F = 705 N</h2>

7 0
3 years ago
Does dropping a magnet down a copper tube produce a current in the tube? explain your answer.
Ratling [72]

Answer:

The current generated in the pipe by the falling magnet is induced where the magnetic field is changing, which is only close to the magnet. Try slitting the pipe lengthwise along one side.

Explanation:

I neep your brainlist answer

plzzzzzzz Mark my answer in brainlist

3 0
3 years ago
Other questions:
  • A car initially traveling at 60 km/h accelerates at a constant rate of 2.0 m/s2. how much time is required for the car to reach
    8·1 answer
  • I need a better understanding of this.. please and thank you!
    7·1 answer
  • What is the speed of a car that travels 60 meters in 5 seconds
    5·1 answer
  • A rod of length L has a mass density given by λ = λo(1 – x/L). What is the rod’s rotational inertia measured about the end where
    9·1 answer
  • NEED A PHYSICS EXPERT TO HELP ME PLS
    14·1 answer
  • Why is respiration considered a chemical change?​
    13·2 answers
  • The gravitational force between two objects is 2700 N. What will be the gravitational force between the objects if the distance
    11·2 answers
  • A block rests on a 15.0° incline. If the block weighs 70. N, what is the normal force on the block?
    12·1 answer
  • What does the area under the velocity-time graph represent.
    9·1 answer
  • Can someone help me with this ​
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!