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CBSE Class 10 Answered

How much is the viscous drag acting on a rocket driven sled that is going at a constant speed against a frictional force  of 22000 N when the thrust of the engine is 31000 N.  
Asked by acv27joy | 06 May, 2018, 03:59: PM
answered-by-expert Expert Answer
Thrust of Engine = 31000 N
Frictional force = 22000 N
Force available for propulsion = 9000 N
 
since the rocket is moving constant speed, force available for propulsion is exactly balanced by viscous drag making net force zero.
 
hence viscous drag = 9000N.
Answered by Thiyagarajan K | 07 May, 2018, 01:10: PM
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