An electric lamp of mass 0.8 kg is attached by an electric cable to the ceiling at point A. The lamp is pulled to one side by a string tied to the ceiling at B. The cable and string make angles of 60° and 40° respectively with the ceiling.
An electric lamp of mass 0.8 kg is attached by an electric cable to the ceiling at point A. The lamp is pulled to one side by a string tied to the ceiling at B. The cable and string make angles of 60° and 40° respectively with the ceiling.
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Transcribed Image Text:An electric lamp of mass 0.8 kg is attached by an electric cable to the ceiling at
point A. The lamp is pulled to one side by a string tied to the ceiling at B.
The cable and string make angles of 60° and 40° respectively with the ceiling.
A
B
60°
40°
cable
string
T,
T,
F=0.8N
(i) The tension in the cable and string respectively are T¡ and T, .
Find T and T, correct to two decimal places.
(ii) What would be the tension in the cable if the string was removed so
the lamp hangs straight down?
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