269804 A parachutist after bailing out falls for 10 s without friction. When theparachuteopens he descends with an acceleration of \(2 \mathrm{~m} / \mathrm{s}^{2}\) against hisdirection and reached the ground with \(4 \mathrm{~m} / \mathrm{s}\). From what height he hasdropped himself \(?\left(\mathrm{~g}=10 \mathrm{~m} / \mathrm{s}^{2}\right)\)
269805 A bodyis dropped from the roof of a multistoried building. It passes the ceiling of the 15th storey at a speed of \(20 \mathrm{~ms}^{-1}\). If the height of each storey is \(4 \mathrm{~m}\), the number of storeys in the building is (take \(\mathrm{g}=10 \mathrm{~ms}^{-2}\) and neglect air resistance)
269804 A parachutist after bailing out falls for 10 s without friction. When theparachuteopens he descends with an acceleration of \(2 \mathrm{~m} / \mathrm{s}^{2}\) against hisdirection and reached the ground with \(4 \mathrm{~m} / \mathrm{s}\). From what height he hasdropped himself \(?\left(\mathrm{~g}=10 \mathrm{~m} / \mathrm{s}^{2}\right)\)
269805 A bodyis dropped from the roof of a multistoried building. It passes the ceiling of the 15th storey at a speed of \(20 \mathrm{~ms}^{-1}\). If the height of each storey is \(4 \mathrm{~m}\), the number of storeys in the building is (take \(\mathrm{g}=10 \mathrm{~ms}^{-2}\) and neglect air resistance)
269804 A parachutist after bailing out falls for 10 s without friction. When theparachuteopens he descends with an acceleration of \(2 \mathrm{~m} / \mathrm{s}^{2}\) against hisdirection and reached the ground with \(4 \mathrm{~m} / \mathrm{s}\). From what height he hasdropped himself \(?\left(\mathrm{~g}=10 \mathrm{~m} / \mathrm{s}^{2}\right)\)
269805 A bodyis dropped from the roof of a multistoried building. It passes the ceiling of the 15th storey at a speed of \(20 \mathrm{~ms}^{-1}\). If the height of each storey is \(4 \mathrm{~m}\), the number of storeys in the building is (take \(\mathrm{g}=10 \mathrm{~ms}^{-2}\) and neglect air resistance)
269804 A parachutist after bailing out falls for 10 s without friction. When theparachuteopens he descends with an acceleration of \(2 \mathrm{~m} / \mathrm{s}^{2}\) against hisdirection and reached the ground with \(4 \mathrm{~m} / \mathrm{s}\). From what height he hasdropped himself \(?\left(\mathrm{~g}=10 \mathrm{~m} / \mathrm{s}^{2}\right)\)
269805 A bodyis dropped from the roof of a multistoried building. It passes the ceiling of the 15th storey at a speed of \(20 \mathrm{~ms}^{-1}\). If the height of each storey is \(4 \mathrm{~m}\), the number of storeys in the building is (take \(\mathrm{g}=10 \mathrm{~ms}^{-2}\) and neglect air resistance)