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padilas [110]
3 years ago
9

A bicycle takes 8 seconds to accelerate at a constant rate from rest to a speed of 4 m/s. If the mass of the bicycle and rider t

ogether is 85 kg, what is the net force acting on the bicycle?
Physics
1 answer:
Anon25 [30]3 years ago
3 0
Force, F = ma

            F =  m(v-u)/t

Where F is force in Newtons,  m = mass in kg = 85kg, v = final velocity, = 4m/s, u = initial velocity = 0 m/s, t = time = 8 seconds.

       F  = 85 * (4 -0) /8= 42.5

     Force = 42.5 N
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Debido al desorden en el laboratorio un científico tiene 2 termómetros diferentes pero no sabe en qué escalas están por lo que d
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
When a certain rubber band is stretched a distance x, it exerts a restoring force of magnitude f = ax, where a is a constant. th
Veseljchak [2.6K]
Given:
F = ax
where
x = distance by which the rubber band is stretched
a =  constant

The work done in stretching the rubber band from x = 0 to x = L is
W=\int_{0}^{L} Fdx = \int_{0}^{L}ax \, dx = \frac{a}{2}  [x^{2} ]_{0}^{L} =  \frac{aL^{2}}{2}

Answer:  \frac{aL^{2}}{2}

4 0
3 years ago
What are somethings about the Heliocentric model?
Rudik [331]

Answer:

Heliocentrism, a cosmological model in which the Sun is assumed to lie at or near a central point (e.g., of the solar system or of the universe) while the Earth and other bodies revolve around it.

Explanation:

6 0
3 years ago
Please Help Me With This:
yanalaym [24]

To find the relative frequencies, divide each frequency by the total number of throws - in this case, 100.

Red: 10/100=1/10=0.1

Yellow:35/100=0.35

Blue:48/100= 0.48

Misses: 7/100=0.07

The event of landing in the red region has a relative frequency of  0.1 which means the dart landed in the red region about 10% (0.1  x 100%) of the time.

5 0
3 years ago
Peter left town A at 13:30 and travelled towards town B at an average speed of 40mph. At 13:45 Philip left town A for town B at
skad [1K]

Answer:

fbddb

Explanation:

dsbse

8 0
3 years ago
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