I ngeed in 13 30 B. 320 as.. rf an object is projected straight up with an initi

Question

I ngeed in 13 30 B. 320 as.. rf an object is projected straight up with an initial spoed or 96 sh. ho huh in eeters does the A. 10 300 490D 600 E 90 P 1936 26. A boy on a 152 ft high bridge throws a rock straight down into a river. 1t 2 fros the instant the rock is released unt i1 it striikes the water, what was the initial vertical velocity of the rock in ft/s A. -22 B.4 c. -64 D. -76 E -88 F. -10S 27. A boy on top of a 144 ft high bui lding throws a ball horizontally. If the ball travels 96 feet hor i zontally before striking the ground, what was the initial horizontal velocity Vx of the ba11? A. 10.7 B. 32 C. 44 D. 48 E. 64 F. 88 28. An object is projected at 98 n/s at 37e with respect to the horizontal. How 1e in seconds does it take for the object to reach its maxisun height? A. 1.84 B. 2 c. 4 D. 5 E. 6 F. 8

Explanation / Answer

24)

From Newton's equation,

s = ut + 0.5 at2

s = (18 x 10) + (0.5 x 10 x 102)= 680 ft

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