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2 A train starts starts from rest. It moves through 1 km. in 100 second with unifrom acceleration. what will be speed at the end of 100 second? |
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Answer» Explanation: initial VELOCITY ( v) 0m/s s= 1 km convert it into m s= 1000M t= 100 sec we have to find acceleration? final velocity ( vf) we can use the formula s= vit +1/2 ×at² 100 = (0) (100) +1/2 × a(100)² 1000= 0+1/2 ×a (1000)² 1000 = 0+ 1/2 ×a (1000) 1000 = a × 5000 a = 5000 / 1000 a = 0.2 ms ‐¹ now vf = vi + at vf = 0+(0.2)×100 vf = 20 m/ s ‐¹ HOPE IT HELPS U .. TAKE CARE |
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