Calculate the force of gravity in (N) on a 87 kg astronaut on the surface of Neptune. The mass of Neptune is 1.02 x 1026 kg, and its radius is 2.5 x 107 m. (Remember G=6.67 x 10-11)

Ahot-air balloon is drifting straight downward with a constant speed of 2.40 m/s. when the balloon is 7.63 m above the ground, the balloonist decides to drop one of the ballast sandbags to the ground below. how much time elapses before the sandbag hits the ground?

Two vectors are shown. which statement best compares the vectors? vector x has greater magnitude than vector y. vector y has greater magnitude than vector x. the vectors have the same displacement. the vectors have the same direction.

Akg a of 55 m at an of 11 ? . if is at 98 km/h,be ?