A certain airplane has a speed of 295.0 km/h and is diving at an angle of 30.0 below the horizontal when the pilot releases a radar decoy (see figure below). The horizontal distance between the release point and the point where the decoy strikes the ground is 700 m. (Neglect air resistance.) (a) How high was the plane when the decoy was released? m (b) How long was the decoy in the air? s

2. A projectile is fired horizontally from a gun that is 40.0 m above flat ground, emerging from the gun with a speed of 250 m/s.

(a) How long does the projectile remain in the air? s (b) At what horizontal distance from the firing point does it strike the ground? m (c) What is the magnitude of the vertical component of its velocity as it strikes the ground? m/s