A Balloon carrying a basket is descending at a constant velocity of 20.0 m/s. A person in the basket throws a stone with an initial velocity of 15.0 m/s horizontally perpendicular to the path of descending balloon and 4.00 (s) later this person sees the stone strike the ground.

a) How high was the balloon when the stone was thrown out?
b) How far horizontally does the stone travel before it hits the ground?
c) At the instant the stone hits the ground, how far is it from the basket?

2 answers

but here is another reply from another teacher

http://www.jiskha.com/display.cgi?id=1202595476
(II) You are explaining why astronauts feel weightless while orbiting in the space shuttle. your friends respond that they thought gravity was just alot weaker up there. convince them and yourself that it isn't so by calculating the acceleration of gravity 250 km above the Earth's surface in term of g.