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Andru [333]
3 years ago
15

A new ski area has opened that emphasizes the extreme nature of the skiing possible on its slopes. Suppose an ad intones "Free-f

all skydiving is the greatest rush you can experience . . . but we’ll take you as close as you can get on land. When you tip your skis down the slope of our steepest runs, you can accelerate at up to 75% of the acceleration you’d experience in free fall." What angle slope could give such an acceleration?
Physics
1 answer:
Allushta [10]3 years ago
5 0

Answer:

48.6°

Explanation:

The forward force, F equals the component of the weight along the slope.

So mgsinθ = ma where a = acceleration and θ = angle between the slope and the horizontal.

So a = gsinθ

Since we are given that a = 75%g = 0.75g,

0.75g = gsinθ

sinθ = 0.75

θ = sin⁻¹(0.75)

= 48.6°

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just olya [345]

Answer:

La escala del termómetro ''A'' es grados Celsius.

La escala del termómetro ''B'' es grados Fahrenheit.

Explanation:

Para hallar en qué escalas están los termómetros partimos de que la mezcla a la cuál se midió su temperatura mantuvo su temperatura constante.

Esto quiere decir que los termómetros están expresando la misma temperatura pero en una escala distinta.

Sabemos que dada una temperatura en grados Celsius ''C'' si la queremos convertir a grados Fahrenheit ''F'' debemos utilizar la siguiente ecuación :

F=(\frac{9}{5})C+32 (I)

Ahora, si reemplazamos y asumimos que la temperatura de 18° es en grados Celsius, entonces si reemplazamos C=18 en la ecuación (I) deberíamos obtener F=64.4 ⇒

F=(\frac{9}{5}).(18)+32=32.4+32=64.4

Efectivamente obtenemos el valor esperado. Finalmente, corroboramos que la temperatura del termómetro ''A'' está medida en grados Celsius y la temperatura del termómetro ''B'' en grados Fahrenheit.

6 0
3 years ago
It takes Serina 4.44 hours to drive to school. Her route is 15 km long. What is Serina’s average speed on her drive to school?
Svet_ta [14]

Answer: 3.38 km per hour

Explanation:

3 0
3 years ago
A 9500 kg boxcar traveling at 14 m/s strikes a stationary second car. The two stick together and move off with a speed of 6.0 m/
jasenka [17]

<u>Answer:</u> The mass of the second car is 12666.7 kg

<u>Explanation:</u>

To calculate the mass of car, we use the equation of law of conservation of momentum, which is:

m_1u_1+m_2u_2=(m_1+m_2)v

where,

m_1 = mass of car 1 = 9500 kg

u_1 = Initial velocity of car 1 = 14 m/s

m_2 = mass of car 2 = ? kg

u_2 = Initial velocity of car 2 = 0 m/s

v = Final velocity = 6.0 m/s

Putting values in above equation, we get:

(9500\times 14)+(m_2\times 0)=(9500+m_2)6.0\\\\m_2=\frac{9500\times 14}{6}-9500=12666.7kg

Hence, the mass of the second car is 12666.7 kg

6 0
4 years ago
Express 2000km to metres​
satela [25.4K]

Explanation:

pure definition :

kilo means 1000 (thousand).

so, a km or kilometer is 1000 m or meter.

2000 km = 2000 × 1000 m = 2,000,000 meters

8 0
2 years ago
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5 0
3 years ago
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