G An object is oscillating as depicted in the expression below. What is the period T T ? Assume that the units work out and the amplitude is in millimeters and the time t t is in units of seconds. x ( t ) = sin ( π 10 t )

Explanation:

x ( t ) = sin ( π 10 t )

This is the equation of a simple harmonic  motion .

standard equation of simple harmonic  motion is as follows

x ( t ) = A sin  ωt , A is amplitude , and ω is angular frequency .

The angular frequency ω = 10π

If time period be   T

ω = 2π / T

10π = 2π / T

T = 2π / 10π

T = .2 s .

Time period = .2 s .

as a general rule, scissors have blades less than 6 in (15 cm) long and usually have handles with finger holes of the same size. shears have blades scissors used to cut hair or fabric must be much sharper.

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.