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alexdok [17]
3 years ago
15

A hiker is walking down a straight road traveling due west. Her journey can be thought of as occurring in 3 consecutive parts: t

raveling 95 minutes at 0.75 m/s, 75 minutes at 1.1 m/s, and then 26 minutes at 0.92 m/s. A. What is her velocity for each part?
Physics
1 answer:
zimovet [89]3 years ago
7 0

Answer:

Velocity in the first part= 0.75 m/s

Velocity in the second part=  1.1 m/s

Velocity in the third part= 0.92 m/s

Explanation:

Conceptual analysis : The velocity ​​is defined by the following formula:

v= d/t

Where:

v : velocity in The speed in meters over second (m/s)

d : distance in meters (m)

t : time in seconds (s)

Problem development

velocity in the first part= 0.75 m/s

velocity in the second part=  1.1 m/s

velocity in the third part= 0.92 m/s

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Un movil viaja a 40km/h y comienza a reducir su velocidad a partir del instante t=0. Al cabo de 6 segundo se detiene completamen
aleksklad [387]

Answer:

1,85 m / s²

Explanation:

De la pregunta anterior, se obtuvieron los siguientes datos:

Velocidad inicial (u) = 40 km / h

Hora inicial (t₁) = 0

Tiempo final (t₂) = 6 s

Velocidad final (v) = 0

Aceleración (a) =?

A continuación, convertiremos 40 km / ha m / s. Esto se puede obtener de la siguiente manera:

1 km / h = 0,2778 m / s

Por lo tanto,

40 km / h = 40 km / h × 0,2778 m / s / 1 km / h

40 km / h = 11,11 m / s

Por tanto, 40 km / h equivalen a 11,11 m / s.

Finalmente, determinaremos la aceleración del móvil durante el período en el que desaceleró. Esto se puede obtener de la siguiente manera:

Velocidad inicial (u) = 11,11 m / s

Hora inicial (t₁) = 0

Tiempo final (t₂) = 6 s

Velocidad final (v) = 0

Aceleración (a) =?

a = (v - u) / (t₂ - t₁)

a = (0 - 11,11) / (6 - 0)

a = - 11,11 / 6

a = –1,85 m / s²

Por tanto, la aceleración del móvil durante el período en el que se ralentizó es de –1,85 m / s²

6 0
3 years ago
A blue train of mass 50 kg moves at 4 m/s toward a green train of 30 kg initially at rest. What is the initial momentum of the g
soldi70 [24.7K]

Answer:

I think answer is zero

bcz momentum=mass×velocity

body was initially at rest it means its velocity is zero

30×0=0

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I am pretty sure it is A Becoming warm

Since it’s moving and causing friction which makes it warm


Hope this helps

Mark me brainliest

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Hopefully this help :)
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