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
Alex73 [517]
3 years ago
4

A 25-gram paper cup falls from rest off the edge

Physics
1 answer:
KATRIN_1 [288]3 years ago
4 0
<span>So a cup falls from the table top to the ground and acquires 0.20 J of kinetic energy in the moment it hits the ground and we want to know what is the total amount of energy converted into thermal energy. While it is on the table, the cup has potential energy and the kinetic energy is 0. The potential energy of the cup is Ep=m*g*h where m=mass of the cup, g= gravitational acceleration of 9.81m/s^2 and h=height of the table. So Ep=0.025*9.81*0.9=0.220725 J. That potential energy converts into kinetic energy and into thermal energy via friction that the air is causing. So Ep=Ek+Efriction. From here: Efriction=Ep-Ek=0.220725 J-0.20J=0.020725J So the correct answer is (1) 0.02J </span>
You might be interested in
How many phase conductors are installed between the switch and the light fixture shown in the figure? A. Four
BARSIC [14]

Answer:

TWO

Explanation:

3 0
3 years ago
Suppose that an object is moving with constant nonzero acceleration. Which of the following is an accurate statement concerning
Wittaler [7]

Answer: The right answer is b)

Explanation:

By definition, acceleration is the change in velocity (in module or direction) over a given time interval, as follows:

a = (v-v₀) / (t-t₀)

If we take t₀ = 0 (this is completely arbitrary), we can rewrite the equation above, as follows:

v = v₀ + at

We can recognize this function as a linear one, where a represents the slope of the line.

If a is constant, this means that the relationship between the change in velocity and the change in time remains constant, in other words, in equal times, its velocity changes in an equal amount.

Let's suppose that a = 10 m/s/s. (Usually written as 10 m/s²).

This is telling us that each second, the velocity increases 10 m/s.

8 0
3 years ago
Someone help pleaseeee
SSSSS [86.1K]

Answer:

C. resonating

an object being forced to vibrate at its natural frequency creates resonance

5 0
3 years ago
Select all that apply. a scientific theory _____. is true all the time is supported by evidence can evolve over time is a guess
Alenkinab [10]
A scientific theory is supported <span>by evidence. The correct option among all the options that are given in the question is the second option. The other choices are incorrect and can be neglected. he scientific theory is often backed by repeated experiments. I hope that this is the answer that has actually come to your help.</span>
5 0
3 years ago
Read 2 more answers
A man is pulling a 13-kg sled across a flat, snowy surface. He holds the handle of the sled at a 30° angle with the ground.
adoni [48]
Check the solution. I hope it helps.. Option D is the correct answer.

6 0
4 years ago
Other questions:
  • A model airplane with mass 0.5 kg hangs from a rubber band with spring constant 45 N/m. How much is the rubber band stretched wh
    14·2 answers
  • An aerobatic airplane pilot experiences weightlessness as she passes over the top of a loop-the-loop maneuver. the acceleration
    14·2 answers
  • Brian and Jack decided to investigate which water fountain at school has the coldest water. The two boys take measurements using
    5·1 answer
  • The two sleds shown below are about to collide. When they collide, they bounce off each other and no energy is lost. The kinetic
    9·1 answer
  • Which of the following is the most appropriate unit to describe the time you can drive a car based on the amount of gas?
    9·2 answers
  • The centripetal force acting on a satellite in orbit
    8·2 answers
  • What is the kinetic energy of a 3-kilogram ball that is rolling at 2 meters per second
    8·1 answer
  • What is Focal Point<br>help me please​
    12·2 answers
  • How sun directly overhead effects climate?
    9·2 answers
  • How do sound waves travel?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!