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                                    other end ordynamometer D is attached to two bodies of massesM-6 kg and m 4 kg. Forces F-20 N and f-10 N areapplied to the masses as shown. The dynamometer reads:(a) 10 N(b) 20 N(c) 6N(d) 14 N | 
                            
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AnswerΒ»  Let x be the force recorded by dynamometer. Both masses move in one direction. The largest force is 20N and the least is 10 N. This means x lies between 10 and 20. This can be represented as shown. 10 < x < 20 The resultant force on : 6kg mass = 20 - x 4 kg mass = x - 10 They have equal acceleration as shown : (20 - x) / 6 = (x - 10) / 4 4(20 - x) = 6( x - 10) 80 - 4x = 6x - 60 140 = 10x x = 14 N ππππππ  | 
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