A pilot flying low and slow drops a weight; it takes 1.8 s to hit the ground, during which it travels a horizontal distance of 140 m . Now the pilot does a run at the same height but twice the speed. How much time does it take the weight to hit the ground

Identify the correct relation showing that the radius r of the orbit of a moon of a given planet can be determined from the radius r of the planet, the acceleration of gravity at the surface of the planet, and the time τ required by the moon to complete one full revolution about the planet. determine the acceleration of gravity at the surface of the planet jupiter knowing that r = 71 492 km and that t= 3.551 days and r= 670.9 × 10^3 km for its moon europa.