University physics 1

right and the following description. y A cannon placed at point 0 res a projectile With a speed of W) = 500 m/s at an angle 6 = 40 above the horizontal and hits a target situated at a point A up 0 ' a a slope as shown in the figure at right. The straight- line distance 0A is 17.5 km and the line 0A makes an angle ,6 = 16 with the horizontal. Neglect air resistance. 12). How long after firing does the projectile hit the target? A). 23s B). 323 C). 45s D). 35s 13). Xcomponent of the projectile's velocity at the instant it hits the target at point A is: A). 321 m/S B). 383 m/s C). 414 m/S D). 480 m/S 14). Two blocks, each of mass m are hung from the ceiling of an elevator which has an upward acceleration as shown in the gure at right. The tensions T1 and T2 are 7': given by: t . In El A).TI=2m(a+g) & TZ=m(a+g) B).TI=2m(ag) & T220 '1' C).TI=2mamg & T2=m(a+g). D).f,=m(a+g) & TZ=m(ag) '\