Physics, 09.10.2019 06:00 jjackson0010

Ahiker walked a hiking trail according to the chart below. what is a possible explanation of the hiker's movement?

a. the hiker had an easy, level trail from 11: 00-12: 00 and was able to travel the fastest during that time period.

b. the hiker got tired and walked the slowest from 1: 00-2: 00.

c. the hiker stopped for lunch from 11: 00-12: 00 and that slowed him down.

d. the hiker ended up in the same place that he started.

Ahiker walked a hiking trail according to the chart below. what is a possible explanation of the hik

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Answer from: 7obadiah

a.The hiker had an easy, level trail from 11:00-12:00 and was able to travel the fastest during that time period.---> may be because this was indeed fastest stage

b.The hiker got tired and walked the slowest from 1:00-2:00.---> no, because this was not the slowest stage

c.The hiker stopped for lunch from 11:00-12:00 and that slowed him down.---> no because this was the fastest stage

d.The hiker ended up in the same place that he started.---> no, because the hiker walked more toward east than toward west and more toward south than toward north.

option a)

Answer from: Quest

force is based upon mass and acceleration.the statement is not always true.

it can be explained from newton's second law of motion.

as per newton's second law of motion the rate of change of momentum is directly proportional to the applied force and takes place along the direction of force.

mathematically it can be written as -

$f\alpha \frac{dp}{dt}$

⇒ $f= k \frac{dp}{dt}$

here k is the proportionality constant whose value is 1.

$f=\frac{dp}{dt}$

$f= \frac{d[mv]}{dt}$

$f= m\frac{dv}{dt} +v\frac{dm}{dt}$

$f=ma+v\frac{dm}{dt}$ [a is the acceleration=dv/dt]

hence we see that force not only depends on mass and acceleration but also on velocity and rate of change of mass. force f will depend on mass and acceleration only when mass is constant.

hence the statement that force is based upon mass and acceleration is false.

Answer from: Quest

You would need to take a picture so i can see

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