Physics, 28.07.2019 08:40, softballlover487

Atrain travels 56 km east from its starting position. its starting point is 45 km east of its station. what is its final displacement relative to the station?

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answered: meg7211

101km

Explanation:

If the train had started its journey starting from the station, its displacement would be 56km, but because the train began its journey 45km east from the station, what we must do is add the 56 km traveled to its initial position that is 45km (we can add them because both distances are on the same direction east):

d=45km+56km=101km

the final displacement relative to the station is 101km to the east.

answered: Guest

the higher the current the higher the mag field around it the higher the influence on the compass

answered: Guest

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.

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Atrain travels 56 km east from its starting position. its starting point is 45 km east of its statio...