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Grade: 11
        
Two particles of mass 'm' are tied at the ends of a light string of length '2a'. The whole system is kept on a frictionless horizontal surface with the string held tight so that each mass is at a distance 'a' from the center 'P' (as shown in the figure). Now, the mid-point of the string is pulled vertically upwards with a small but constant force 'F'. As a result, the particles move toward each other on the surface. What is the magnitude of acceleration when the separation between them becomes '2x' 
one year ago

Answers : (1)

Arun
23032 Points
							
Draw FBD then
2T sin θ = F
T cos θ = mA
 
2  tanθ = F/mA 
 
A = F/2m (x/sqrt (a2 – x2)
 
hope it helps
 
Regards
Arun
one year ago
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