Year 11 Physics Question - Help me!?

Z

Zachary

New member
I have an exam coming soon and was hoping to grab some help on a tricky question out of my textbook;

The question exactly;

A large Christmas decoration in the shape of a Santa is to be hung above the street by the city council. To suspend it above the middle of the roadway it will need two cables: one attached to a light pole and the other to the side of a building. If the cable attached to the light pole makes an angle of 40 degrees with the horizontal and the tension in the cable attached to the building is 200N determine;

a) The mass of the Santa
b) The angle between thee horizontal and the cable attached to the building.

Basically;

To the left of Santa (lightpole) is a triangle that reads the Hypotenuse being 100N and the angle 40 degrees.

The right of Santa (building) is a Hypotenuse of 200N and an unknown angle.

I have no what to do.

Respond quickly please!!!!!
 
100 cos 40* = 200 cos A
=>cos A = 0.5 x cos 40* = 0.5 x 0.77 = 0.38 = cos 68*
=>A = 68*[ans. for 2]
W = 100 sin 40* + 200 sin 68*
=>W = 100 x 0.64 + 200 x 0.93
=>W = 64 + 186 = 250 N
=>Mass = W/g = 250/9.8 = 25.51 kg [ans. for 1]
 
Back
Top