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
mestny [16]
3 years ago
15

A 25-kg child sits at the top of a 4-meter slide. After sliding down, the child is traveling at 5 m/s. How much PE does he start

with? How much KE does he end with? How much energy is lost to friction?
Physics
1 answer:
Semmy [17]3 years ago
4 0

Daniddmelo says it right there, don't know why he got reported.

The potential energy (PE) is mass x height x gravity. So it would be 25 kg x 4  m x 9.8 = 980 joules. The child starts out with 980 joules of potential energy. The kinetic energy (KE) is (1/2) x mass x velocity squared. KE = (1/2) x 25 kg x 5 m/s2 = 312.5 joules. So he ends with 312.5 joules of kinetic energy. The Energy lost to friction =  PE - KE. 980- 312.5 = 667.5 joules of energy lost to friction.

Please don't just copy and paste, and thank you Dan cause you practically did it I just... elaborated more? I dunno. 

You might be interested in
PLEASE HELP :) THANK YOU Geologic processes change Earth's surface on varying scales of space and time. They range from rapid to
Misha Larkins [42]

Answer:

Human change the surface by mining it, falting it for land, we remove tree,plants, soil,mud, to build space for buidlings, farms, and etc hopes this help

Explanation:

7 0
3 years ago
Which of the following is not an example of critical thinking?
Ipatiy [6.2K]
Critical thinking means that you should question everything that you read and hear and you should also verify your information. You should not just accept the first possible answer without questioning or verifying it. 

So the correct answer is:
c. implementing the first solution to a problem identified
8 0
3 years ago
Read 2 more answers
A runner went from 6 m/s and two seconds what was his acceleration
Radda [10]

Answer:

is it 3?

Explanation:

Im taking a guess and just dividing 6 and 2

8 0
3 years ago
A dog barking at the sound of the postal carrier delivering mail is reacting to what type of cue?
Gwar [14]

Answer:

A. External

Explanation:

External stimulus includes touch/pain, vision, smell, taste, and sound.

6 0
2 years ago
What reactions do catalytic converters catalyze
Yuliya22 [10]
A catalytic converter is an exhaust emission control device that reduces toxic gases and pollutants in exhaust gas from an internal combustion engine into less-toxic pollutants by catalyzing a redox reaction (an oxidation and a reduction reaction).
3 0
3 years ago
Other questions:
  • Heeeeelp urgent<br><br> I need an compare and contrast between energy and work.<br><br> 20 pts.....
    5·2 answers
  • What was the greatest contribution of the monasteries? A. Illuminated manuscripts. B. Cloisters. C. Sculpture.d. Transepts
    6·2 answers
  • When aluminum-27 is bombarded with a neutron, a gamma ray is emitted. what radioactive isotope is produced?
    10·2 answers
  • which force will decrease if the surface of a ramp is made smoother. gravity, magnetism, friction, or electricity
    9·2 answers
  • ________ is a change in the position of a body with respect to time relative to a reference point.
    6·2 answers
  • A car starts from rest at a stop sign. It accelerates at 4.0 m/s^2 for 3 seconds, coasts for 2 s, and then slows down at a rate
    9·2 answers
  • A car starts from rest at a stop sign. It accelerates at 2.0 m/s2 for 6.2 seconds, coasts for 2.5 s , and then slows down at a r
    8·1 answer
  • A diffraction grating is placed 1.00 m from a viewing screen. Light from a hydrogen lamp goes through the grating. A hydrogen sp
    14·1 answer
  • Which image illustrates refraction?
    13·1 answer
  • Why is it easier to open a door by holding it from it's edge​
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!