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
Artyom0805 [142]
3 years ago
5

A 92-kg skier is sliding down a ski slope that makes an angle of 40 degrees above the horizontal direction. the coefficient of k

inetic friction between the skis and the snow is 0.293. neglecting any air resistance, what is the acceleration of the skier?
a) 5.8 m/s2
b) 4.9 m/s2
c) 9.8 m/s2
d) 4.1 m/s2
e) 2 m/s2
Physics
1 answer:
Nikitich [7]3 years ago
4 0

Answer:

d) a = 4.1 m/s²

Explanation:

m = 92 Kg

∅ = 40º

μ = 0.293

a = ?

We can obtain the forces in the direction x' (of motion)

Wx' = W*Sin ∅ = m*g*Sin ∅

Ffriction = μ*N = μ*m*g*Cos ∅

then we use Newton's 2nd Law as follows:

Wx' - Ffriction = m*a

m*g*Sin ∅ - μ*m*g*Cos ∅ = m*a

⇒   a = g*(Sin ∅ - μ*Cos ∅)

⇒   a = (9.81 m/s²)*(Sin 40º - 0.293*Cos 40º)

⇒   a = 4.1038 m/s²

You might be interested in
What is the month of winter
Tanya [424]
Period of months where the weather is the coldest and the days are the shortest.
5 0
3 years ago
Read 2 more answers
I will mark you brainlist. How can you use a tuning fork to tune a piano?
Phoenix [80]

A tuning fork's job is to establish a single note that everybody can tune to.

Most tuning forks are made to vibrate at 440 Hz, a tone known to musicians as "concert A." To tune a piano, you would start by playing the piano's "A" key while ringing an "A" tuning fork. If the piano is out of tune, you'll hear a distinct warble between the note you're playing and the note played by the tuning fork; the further apart the warbles, the more out-of-tune the piano. By either tightening or loosening the piano's strings, you reduce the warble until it's in line with the tuning fork. Once the "A" key is in tune, you would then adjust all of the instrument's 87 other keys to match. The method is much the same for most other instruments. Whether you're tuning a clarinet or guitar, simply play a concert A and adjust your instrument accordingly

Explanation:

It can be a bit tricky to hold a tuning fork while manipulating an instrument, which is why some musicians decide to clench the base of a ringing tuning fork in their teeth. This has the unique effect of transmitting sound through your bones, allowing your brain to "hear" the tone through your jaw. According to some urban legends, touching your teeth with a vibrating tuning fork is enough to make them explode. It's a myth, obviously, but if you have a cavity or a chipped tooth, you'll quickly find this method to be unbelievably painful.

Luckily, you can also buy tuning forks that come mounted on top of a resonator, a hollow wooden box designed to amplify a tuning fork's vibrations. In 1860, a pair of German inventors even devised a battery-powered tuning fork that musicians didn't need to ring again and again

6 0
3 years ago
Please help will mark brainliest
andreyandreev [35.5K]

Answer:

b

Explanation:

it melts yes but it's still water [same element] so there fore it's a physical change

7 0
3 years ago
Read 2 more answers
You are on a rollercoaster going around a curve. Your speed is a constant 40 miles per hour. Are you accelerating?
vodomira [7]
No, you are at a constant rate which means that you are always at 40mph
8 0
3 years ago
An increase in speed or velocity can be described as:
rodikova [14]

Answer:

acceleration

rhymes with accelerator

Explanation:

the increase/decrease or the sudden change in speed and direction of object

7 0
3 years ago
Other questions:
  • Letters A, B, C, and D represent locations on a bar magnet. Which location has the greatest magnetic force?
    15·2 answers
  • A coin dropped from the top of a precipice (cliff) takes 2.42 to hit the ground. How highis the precipice (cliff)? .
    9·1 answer
  • What is the minimum thickness of coating which should be placed on a lens in order to minimize reflection of 566 nm light? The i
    10·1 answer
  • A sinusoidal transverse wave travels along a long, stretched string. The amplitude of this wave is 0.08190.0819 m, its frequency
    5·1 answer
  • A photovoltaic panel of dimension 2 m × 4 m is installed on the roof of a home. The panel is irradiated with a solar flux of GS
    14·1 answer
  • To calculate acceleration you must know both the objects velocity and_____
    13·1 answer
  • What does the area under the velocity-time graph represent.
    9·1 answer
  • Evelynn is measuring the pitch of a piano note. What unit of measurement is she most likely recording her value
    12·1 answer
  • What are the characteristics of Parallel circuit??<br>​
    15·1 answer
  • Erwin Schrödinger developed the quantum model of the atom. What scientific knowledge was necessary for Schrödinger’s work?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!