Advertisements
Advertisements
Question
Apply Lami’s theorem on the slingshot and calculate the tension in each string?
Solution
Given,
F = 50 N, θ = 30°
Here T is resolved into its components as T sin θ and
T cos θ as shown.
According to Lami’s theorem,
`F/sintheta = T/sin(180 - theta) = T/(sin(180 - theta))`
`F/sintheta = T/sintheta`
`F/(2sintheta costheta) = T/sintheta[T = T/(2costheta)]`
T = `T/(2costheta) = 50/(2cos30) = 28.868` N
APPEARS IN
RELATED QUESTIONS
An object of mass m held against a vertical wall by applying horizontal force F as shown in the figure. The minimum value of the force F is ______
Two blocks of masses m and 2m are placed on a smooth horizontal surface as shown. In the first case, only a force F1 is applied from the left. Later only a force F2 is applied from the right. If the force acting at the interface of the two blocks in the two cases is the same, then F1 : F2 is ______
When an object is at rest on the inclined rough surface, ______
Using a free body diagram, show that it is easy to pull an object than to push it.
The physics books are stacked on each other in the sequence: +1 volumes 1 and 2; +2 volumes 1 and 2 on a table.
a) Identify the forces acting on each book and draw the free body diagram.
b) Identify the forces exerted by each book on the other.
What are concurrent forces?
State Lami’s theorem.
