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yations of motion of a body moving under gravity., , 1) When a body is thrown vertically upward from height h above the ground, , 2) When a body is dropped from a certain height above the ground, the initial, , 3) When a moving body comes to rest, the final velocity v = 0., , 4) While deriving equations of motion,, , Relative velocity of the body A with respect to the body B, Vas, Relative velocity of the body B with respect to the bod, , LEGENDS” (MGDN) STU IDY MATERIAL — 1 PUC PHYSICS (NCERT)-Motion in a straight lin., e, , , , , , , , , , , For the bodies falling vertically For the bodies rising vertically |, , , , , , , , , , downward , upward from the ground,, pei, cere ih (Ce BIS) ee ene Ah = height), vy = u+gt ’ v= U-gt, es f os, h =ut+=at h =ut-—g?’, u 2 Gg ‘ ut 7, 2 = ve s2gh vy? = u’=2gh a, , , , , , and reached the ground int seconds, then we can use, h =-ut+ 5a", , velocity u = 0., , the resistance offered by the air to the |, , motion of the body is neglected., , lative velocity (Along one dimension), lt is the velocity of one body with respect to the velocity of another body., , lie velocity when two bodies move along the same direction, , A Vis B Vay, e_— eo—_—, , Relative velocity of the body A with respect tothe body B, Vas = Va- Ve, , Relative velocity of the body B with respect to the body A, Wen = Va Va, lative velocity when two bodies approach each other, A@— Va Vy<—@ 8, = V,tVe, , y A, Vea = VatYs