Answer:
accleraion normal ski 0.0735 m/s², new ski 0.219 m/s²
Explanation:
This exercise should work with the one-dimensional kinetic equations, specifically with the equation
x = v₀ t + ½ a t²
When the skier is at the exit they are at rest, so their initial speed is zero
(v₀ = 0)
x = ½ a t²
Let's calculate the acceleration for normal skiing
a₁ = 2 x / t²
a₁ = 2 175/69²
a₁ = 0.0735 m/s²
a₁ = 7.35 10⁻² m/s²
Let's calculate the acceleration with the new plastic ski
a₂ = 2 x / t₂²
a₂ = 2 175/40²
a₂ = 0.219 m/s²
a₂= 2.19 10⁻¹ m/s²
Answer:
initial velocity (u) = 200m/s
final velocity (v) = 350 m/s
time (t) = 15s
acceleration (a) = ?
NOW,
a=v-u/t
a= 350-200/15
a= 50/15
a= 3.3333
Explanation:
it's too easy just u need to understand the question . and go according to it's content .
main thing to memorize is it's simple formula.
I HAVE SOLVE THIS QNA. IN VERY
SIMPLE AND UNDERSTANDABLE FORM.
I høpë u hađ uņdērstøöď ťhìs şølutîóñ
:verý ×wəłł.
What is the primary source of a sound?
C. A vibration
Which of the following best describes reverberation?
A. The wavefronts become mixed and broken up due to contact with a rough or irregular surface.
_______ occurs when a body’s molecular wavelength sends vibrations to another body, resulting in the production of another sound wave.
D. Resonance
Which of the following is an example of the Doppler effect?
B. Vibrations from a tuning fork pass through the air and cause a nearby dish of water to produce ripples of the same frequency.
In Sir Isaac Newton's time in the early 1700s, what was the general consensus among scientists on the properties of light?
D. Light is composed of particles and travels in a straight line.
If the angle of incidence of a light source to a shiny surface is 30 degrees, what will the angle of reflection be?
C. 30 degrees
If a material has a high index of refraction, it has a
B. high optical density, and light travels more slowly through it.
Which of the following statements regarding the visible spectrum of light is accurate?
D. It has the longest wavelength of all types of waves along the electromagnetic spectrum.
If you were to combine a beam of blue light and a beam of yellow light, what would the result be?
C. Green light
The type of light waves that living things give off naturally is called
D. visible light.
When you're standing in a pool in the summertime, and your leg looks shorter under the water than in air, this is an example of light
B. refraction.
Answer:
the answer is option a(a) 48h in advance.
Explanation:
The second stage warning known as "CYCLONE ALERT"is assused at least 48 hours.in advanced of the expected commencement of adverse weather over the coastal areas.....the third stage warning known as "CYCLONE WARNING" issued at least 24 hours in advance of the expected commencement of adverse weather over the coastal areas.please mark me brainliest