The penny will land first, because the feather displaces the air. That is also why a boat floats, it displaces enough water underneath it that the displaced water pushes up keeping the boat afloat.
fall at the same speed.
Relative to each other . . . zero speed.Relative to you watching them fall . . . equalspeeds.
If they are dropped from the same height, they will fall at equal velocities because there is no air resistance and their accelerations by gravity are equal.
nether both will hit at the same time
air resistance, on the moon they did an experiment where they dropped a hammer and a feather at the same height and time and they hit the ground at the same time
There are many factors that can affect the time for these objects to drop. The height at which each object is dropped is a factor since the height is proportional to time. if the height at which these objects are dropped are the same, then the time for them to drop to the floor is the same. Since the acceleration due to gravity at sea level is 9.81 m/s^2 for all objects no matter the mass, both objects will accelerate at the same rate which means they will reach the floor at the same rate. All in all, both the pencil and the penny will hit the ground at the same time.
If there was no air resistance and a feather and a penny were dropped from the same height they would both pick up speed by the same amount and they would hit the ground at the same speed and at the same time.
Relative to each other . . . zero speed.Relative to you watching them fall . . . equalspeeds.
If they are dropped from the same height, they will fall at equal velocities because there is no air resistance and their accelerations by gravity are equal.
Yes
They wouldn't land at the same time. the rock will land first and quickly because a rock have bigger mass than a feather. A feather is very light, if you ever tried to drop it from some height you could see that it takes very long time to land and it might go away to another place too.
nether both will hit at the same time
as done in Galileo's experiment when he dropped a large rock and a feather from a tall tower both hit the ground at the same moment when dropped from the same height.
Purely air resistance, the feather floats on the air. The mass is irrelevant. If a penny was dropped at the same time as a brick (ignoring wind resistance) both would hit the ground at the same time. Look up Galileo's tower of Pisa experiment. http://en.wikipedia.org/wiki/Galileo%27s_Leaning_Tower_of_Pisa_experiment This also includes a video of a feather and a hammer being dropped on the moon (where there is no air). Both hit the ground together.
both reaches the ground at the same time because in the moon there occurs free fall.
air resistance, on the moon they did an experiment where they dropped a hammer and a feather at the same height and time and they hit the ground at the same time
There are many factors that can affect the time for these objects to drop. The height at which each object is dropped is a factor since the height is proportional to time. if the height at which these objects are dropped are the same, then the time for them to drop to the floor is the same. Since the acceleration due to gravity at sea level is 9.81 m/s^2 for all objects no matter the mass, both objects will accelerate at the same rate which means they will reach the floor at the same rate. All in all, both the pencil and the penny will hit the ground at the same time.
They would hit the surface together, after a very long time. Gravity on Ceres is pretty light.