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    				| 1. | A block of mass 10 kg, moving in x direction witha constant speed of 10 m/s, is subjected to aretarding force F-0. Ix.J)/m during itstravel fromx = 20 m to 30 m. Its final KE will be :(1) 450 J(3) 250 J(2) 275 J(4) 475 J | 
| Answer» i think the answer is 475j. please inform me whether i am right or not | |