You launch a projectile toward a tall building, from a position on the ground 38.2 m away from the base of the building. The projectile s initial velocity is 32.6 m/s at an angle of 54.5 degrees above the horizontal. At what height above the ground does the projectile strike the building? a. 56.6 m b. 19.5 m c. 33.6 m d. 70.7 m

4. A projectile is fired from the ground at a 45° angle of elevation with initial velocity T(0) = (in meters per second). a. Find the horizontal distance travelled. b. Find the speed at impact.

A. 53.76 s D. 64.87 s B. 48.63 s E. 65.66 s C. 60.00 s F. 74.72 s 1--1 IXXKI Within the jet stream, a plane flies 200 m/s at 18° South of West. The jet stream itself is moving 120 m/s due North. Find the velocity of the jet relative to the ground. 6. magnitude A. 198.9 m/s B. 163.9 m/s 131.4 m/s 201.5 m/s 266_m/s C. 312.7 m/s 1--1 direction A. 18.5° N of W D. 17.01° N of W B. 23.12° N of W E. 29.54° N of W C. 22.93° N of W F. 33.97° N of W 1--1 IVOLG A river has a 6.5 m/s current due East. With respect to the water, the boat's velocity is 16 m/s at 84° north of east. What is the velocity of the boat relative to the Earth? (State the angle relative to due East.) 8. magnitude 17 99 m/s D 2762 m/s MacBook Pro 7. DEE E.

Three identical balls are launched with the same initial speed from the top of a cliff overlooking flat ground. Ball A is launched horizontally. Ball B has an initial velocity directed 20 degrees below the horizontal. Ball C has an initial velocity directed 40 degrees above the horizontal. Which ball hits the ground with the highest speed? a. Ball A b. Ball B c. Ball C d. Equal for all three