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| 1. |
a cycle is travelling at the speed of 50 km/h after applying brakes body accelerates uniformly and take 10 s to stop and another cycle travelling at the speed of 40 km/h after applying brakes the cycle stop in 20 s . find who travel farthest after applying brakes and also plot the speed versus time between two cycles in a graph . |
| Answer» E 1st cycle A , TIME taken ( LET it be t1 ) = 10 s speed ( let it be v1 ) = 50 km/h = 50 * 1000/3600 m/s distance ( let it be d1 ) = ? let the 2nd cycle B , time taken ( let it be t2 ) = 20 s speed ( let it be v2 ) = 40 km/h = 40 * 1000/3600 m/s distance ( let it be D2 ) = ?d1 = speed * time = 50 * 1000*10/3600 = 138.88 MD2 = speed * time = 40 * 1000* 20 /3600 = 222.22 m .·. cycle B is go farther . | |