rock is thrown at a 30 degree angle above the horizontal from the edge of a cliff. It hits the water below in .8 secs. If it had been thrown with an initial velocity vector that had the same vertical component and double the original horizontal component, how long would it have taken to hit the ground?

In the figure, a baseball is hit at a height h = 1.20 m and then caught at the same height. It travels alongside a wall, moving up past the top of the wall 1.3 s after it is hit and then down past the top of the wall 3.6 s later, at distance D = 45 m farther along the wall. (a) What horizontal distance is traveled by the ball from hit to catch? What are the (b) magnitude and (c) angle (relative to the horizontal) of the ball's velocity just after being hit? (d) How high is the wall? %3D (a) Number 75.77 Units (b) Number" 30.30 Units m/s (c) Number Units ° (degrees) 60 (d) Number 32.413 Units

A graphing surprise. At time t = 0, a burrito is launched from level ground, with an initial speed of 16.0 m/s and launch angle . Imagine a position vector continuously directed from the launching point to the burrito during the flight. Graph the magnitude r of the position vector for (a) = 40.0° and (b) = 80.0°. For = 40.0°, (c) when does r reach its maximum value, (d) what is that value, and how far (e) horizontally and (f) vertically is the burrito from the launch point? For = 80.0°, (g) when does r reach its maximum value, (h) what is that value, and how far (i) horizontally and (j) vertically is the burrito from the launch point?

In the annual battle of the dorms, students gather on the roofs of Jackson and Walton dorms to launch water balloons at each other with slingshots. The horizontal distance between the buildings is 36.0 m, and the heights of the Jackson and Walton buildings are, respectively, 18.0 m and 20.0 m. The first balloon launched by the Jackson team hits Walton dorm 2.00 s after launch, striking it halfway between the ground and the roof. Ignore air resistance. (a) Find the direction of the balloon's initial velocity. Give your answer as an angle (in degrees) measured above the horizontal. (b) A second balloon launched at the same angle hits the edge of Walton's roof. Find the initial speed of this second balloon. (a) Number i Jackson VO Units ====== ===== --0- MacBook Air --7 17 10 17 Walton H