Physics
posted by Lanise .
physics  drwls, Sunday, January 24, 2010 at 2:50am
Compute the angle of the strings from vertical. It is sin^1 (8.5/40)
Call this angle A
If the string tension is T
T sin A = F (the Coulomb force)
T cos A = M g
tan A = F/Mg
You need to say what the units of the mass are. All you said was 0.09
The mass is 0.09 gm.
What does sin^1 (8.5/40)mean. Is this sin to the negative 1 times 8.5 divided 40.
And to find T is this Mg/cosA to find T?

sin^1 means the angle whose sine is ...
in this case the angle whose sine is 8.5/40
Some write this function as Arcsin ( )
Respond to this Question
Similar Questions

physics
A 4.00kg object is attached to a vertical rod by two strings. The object rotates in a horizontal circle at constant speed 6.00 m/s. What is the tension in the upper string and the lower string. Well your missing information here, … 
Last physics help question (my thoughts given)
A 160N child sits on a light swing and is pulled back and held with a horizontal force of 100N. The tension force of each of the two supporting ropes is: a) 60N b) 94N c) 120N d) 190N e) 260N work: weight is down, the pull is back, … 
physics
A doubly tethered model airplane of mass 1.0 kg is attached to a vertical rod by two very light strings that are 2.0 each in length. the airplane and the the strings rotate in a horizontal circleabout the rod with both the strings … 
Physics
A string of length 50cm is used to hang a picture frame from a nail hammered on a smooth wall. The frame is 20 cm wide and weighs 10N. It hangs symetrically. The angle which each part of the string makes with the vertical is 23.6. … 
Physics
Two 0.09g pith balls are suspended from the same point by threads 40cm long. (Pith is a light insulating material once used to make helmets worn in tropical climates.) When the balls are given equal charges, they come to rest 19 cm … 
Trigonometry
ABC is a nondegenerate triangle such that 2\sin \angle B \cdot \cos \angle C + \sin \angle C = \sin \angle A + \sin \angle B, what is the value of \lfloor 100 \frac {AC}{AB} \rfloor ? 
Physics
A 1.13 kg ball is connected by means of two ideal strings to a vertical, rotating rod. The strings are tied to the rod and are taut. The upper string is 24.0 cm long and has a tension of 31.5 N, and it makes an angle θ2 = 51.0° … 
Physics
Your friend's 13.9g graduation tassel hangs on a string from his rearview mirror. When he accelerates from a stoplight, the tassel deflects backward toward the rear of the car at an angle of 5.47∘ relative to the vertical. Find … 
Physics
A 0.79 kg ball is connected by means of two ideal strings to a vertical, rotating rod. The strings are tied to the rod and are taut. The upper string is 29.0 cm long and has a tension of 29.7 N, and it makes an angle θ2 = 64.0° … 
Physics
A 10 kg mass is hung from 2 light, inextensible strings such that the vertical string is attached to the top of the block at an angle 60 degree and the other string is attached straight horizontally to the adjacent side of the mass. …