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
Natasha2012 [34]
3 years ago
13

A child slides down a snow‑covered slope on a sled. At the top of the slope, her mother gives her a push to start her off with a

speed of 1.10 m/s. The frictional force acting on the sled is one‑fifth of the combined weight of the child and the sled. If she travels for a distance of 22.5 m and her speed at the bottom is 3.70 m/s, calculate the angle that the slope makes with the horizontal.
Physics
1 answer:
kirill [66]3 years ago
5 0

Answer:

θ = 13.16 °

Explanation:

Lets take mass of child = m

Initial velocity ,u= 1.1 m/s

Final velocity ,v=3.7 m/s

d= 22.5 m

The force due to gravity along the incline plane = m g sinθ

The friction force = (m g)/5

Now from work power energy

We know that

work done by all forces = change in kinetic energy

( m g sinθ - (m g)/5 ) d = 1/2 m v² - 1/2 m u²

(2  g sinθ - ( 2 g)/5 ) d = v² -  u²

take g = 10 m/s²

(20 sinθ - ( 20)/5 ) 22.5 = 3.7² -  1.1²

20 sinθ - 4 =12.48/22.5

θ = 13.16 °

You might be interested in
Which statement describes how work and power are similar?
postnew [5]
The statement that describes how work and power are similar is D. you must know time and energy to calculate both.
I am not completely sure though, so I hope this helps. :)
6 0
3 years ago
Read 2 more answers
Sound waves cannot travel in
julsineya [31]

Answer:

The answer is D.  A Vacumn

Explanation:

Sound cannot travel through a vacuum. A vacuum is an area without any air, like space. So sound cannot travel through space because there is no matter for the vibrations to work in.

5 0
3 years ago
Explain the process that causes dew to form on blades of grass?
luda_lava [24]
<span>Heat is radiated, atmospheric moisture condenses at a rate greater than that at which it can evaporate, resulting in the formation of water droplets.</span>
7 0
2 years ago
Read 2 more answers
A stone of mass 0.2 kg falls with an acceleration of 10.0 m/s. How big is the force that causes this acceleration?
Kobotan [32]

Answer:

\boxed {\boxed {\sf 2 \ Newtons}}

Explanation:

According to Newton's Second Law of Motion, force is the product of mass and acceleration.

F= m \times a

The mass of the stone is 0.2 kilograms and the acceleration is 10.0 meters per square second.

  • m= 0.2 kg
  • a= 10.0 m/s²

Substitute the values into the formula.

F= 0.2 \ kg * 10.0 \ m/s^2

Multiply.

F=2 \ kg*m/s^2

Convert the units.

  • 1 kilogram meter per square second (kg*m/s²) is equal to 1 Newton (N)
  • Our answer of 2 kg*m/s² is equal to 2 N

F= 2 \ N

The force is <u>2 Newtons.</u>

4 0
3 years ago
Why does the earth orbit the sun for 1 month
VikaD [51]
The Earth orbits the sun constantly, continuously, and all the time.  " 24/7/365 "

From the sun's point of view, it takes the Earth roughly 365 and 1/4 days
to make the complete trip, all the way around one time.  That's the length
of time that we call "one year".

When you talk about orbiting in one month, you're thinking of the moon
orbiting the Earth. THAT length of time is about 27.32 days.
3 0
3 years ago
Read 2 more answers
Other questions:
  • No person who thinks scientifically places any faith in the predictions of astrologers. Nevertheless there are many people who r
    11·2 answers
  • What object best represents a true scale model of the shape of earth?
    12·1 answer
  • What is the resultant of a and b if a = 3i 3j and b = 3i − 3j?
    11·2 answers
  • A(n) _____ is a gap in the geologic record where some rock layers have been lost because of erosion.
    12·1 answer
  • imagine a horse pulling a cart. What would happen to the speed of the cart if several bags of cement were adding to the cart?
    9·2 answers
  • "The two equations below express conservation of energy and conservation of mass for water flowing from a circular hole of radiu
    7·1 answer
  • The coulombic force between two ions is reduced to ______ of its original strength when the distance between them is quadrupled.
    8·1 answer
  • What is a concern about recovered memories?
    15·2 answers
  • Kayla draws the image shown as part of her physical science homework.
    10·1 answer
  • The temperature inside my refrigerator is about 4 degrees C. If I place a balloon in my fridge that initially has a temperature
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!