When using a pencil eraser, you exert a downward force of 7.5 N at a distance of 2.2 cm from the hardwood-eraser joint. The pencil has a 3.4 mm radius and is held at an angle of 16° to the horizontal. The shear modulus of wood is 1.00 × 1010 N/m2 and the strain modulus is 1.50 × 1010 N/m2. By how much does the wood flex perpendicular to its length in meters? How much is it compressed lengthwise in meters?

15.3 cos 65 degrees trig

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.

find the sum of the two horizontal vectors and the sum of the two vertical vectors

isoceles right angled triangle

amplitude

hope this