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(a) A ball is thrown vertically upward from the groundwith an initial velocityof 39.2 m/sec. if the onlyforceconsdieredis thatattributedto theacceleration due to gravity , find (i) How longwill it takefor the ballto strike the ground ? (ii) the speed with whichwill it strike the ground ? and(iii)how highthe ball will rise ? (OR) (b) A wound is healingin such a way that t days sinceSundaythe areaof the woundhas beendecreasingat a rate of-3 /( ( t+2)^(2))cm^(2) per day. If onMonday the areaof the woundwas2 cm^(2) (i) What was thearea of the wound on Sunday ? (ii) What is theanticipatedarea of the woundon Thursday if itcontinues to heal at the same rate ? |
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Answer» (i) `t = 8 SEC` (II)v = 39.2 m/sec (b)(i)2.5 sq.CM (ii)1.5 sq. cm. (b)` 1/x^(2)` |
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