Two forces of 10 n and 30 n are applied to a 10 kg box. find (1) the box’s acceleration when both forces point due east and (2) the box’s acceleration when 10 n force points due east and 30 n force points due west.

Explanation:

Given that,

First force = 10 N

Second force = 30 N

Mass of box = 10 kg

(1). When both forces point due east

Then the net force will be

We need to calculate the acceleration

Using newton's second law

put the value into the formula

The box accelerate towards east.

(2). When 10 N force points due east and 30 N force points due west.

Then the net force will be

We need to calculate the acceleration

Using newton's second law

The box accelerate towards west.

Hence, This is the required solution.

russian is not my first language, so i'm afraid i can't write out an answer in russian, but hopefully you can find a way to do so. here's my best translation of the problem: you're given a plot of a particle's position in one-dimensional space over time, and you're asked to find either the total distance traveled by the particle after 6 seconds had elapsed, or the total displacement of the particle after 6 seconds.

if you want the total distance traveled, you would first need to determine the particle's velocity as a function of time, then integrate that over the 6-second interval. we know the position function is quadratic with roots at 0 and 6, so we have

where is unknown. because the position is parabolic, there is symmetry about the midpoint at , and we know that

so that the position function is

which means the velocity is

then the total distance traveled is

so the total distance traveled is 20 m.

on the other hand, if you want to find displacement: the particle starts at and ends at , so its displacement is 0.