Friday

July 25, 2014

July 25, 2014

Posted by **Allison** on Tuesday, December 21, 2010 at 3:29pm.

a) what is the equation of a sinusoidal function that describes the motion of the building in terms of time?

b) if a damper is added to this building, it will reduce the sway (not the period) by 70%. what is the equation of the new function that describes the motion of the building in terms of time?

- Grade 11 math - HELP! -
**MathMate**, Wednesday, December 22, 2010 at 10:04pmI assume that the building goes directly from one extreme to the other in 12-2=10 seconds. Therefore the half-period is 10 seconds, or the period T=20 s.

The neutral position is at (2+10)/2=6 seconds, when the displacement is zero.

Thus we have

Xo=30 cm = 0.3m

X(t)=Xo sin((t-6)*2π/T), or

X(t)=0.3sin((t-6)π/10)

**Related Questions**

math - one elevator leaves first floor of a building at 9:00 a.m. It takes 5 ...

Physics - Calculate the change in potential energy of a 86.9 kg man when he ...

University math grade 11 Trig - A very tall light standard is swaying in an east...

Physics - IMAGINE- a building 6400km. high. On the ground floor, a person weighs...

please help-- PHYSICS - IMAGINE- a building 6400km. high. On the ground floor, a...

PHYSICS- please help - IMAGINE- a building 6400km. high. On the ground floor, a ...

physics - An elevator is stopped at the ground floor. It starts moving upwards ...

physics - An elevator is stopped at the ground floor. It starts moving upwards ...

physics - An elevator is stopped at the ground floor. It starts moving upwards ...

physics - An elevator is stopped at the ground floor. It starts moving upwards ...