which will hit the ground the fastest a small paper ball big paper ball big rock or small rock?
464783
The paper is out, because of wind resistance, leaving only the small and big rocks.  Refering to the 11th century-actually, Newton's law was supplanted some years ago, and we know that the acceleration due to gravity is determined by the combined gravitational forces of both objects.  Assuming an exactly equal shape and an exactly equal density of the two rocks, the larger would fall more rapidly, because of the involvement of it's own gravity.  If we assume, for example, that the small rock is the size of a baseball, and the big rock is the size of, oh...the moon, then the big rock will fall quite a bit faster (the combined gravity will be greater, because of greater mass).  As the large rock gets smaller, the gravity will decrease.  However, no matter how close in size the two rocks, there will be some difference.  It would not be easily measurable at anything less that a few million tons, but it would still be there.\nNewton was likely the greatest genius that ever lived...but we have moved beyond him in a lot of areas, including our understanding of gravity-
579002
First I'll assume this isn't a trick question, i.e., that the balls start with the same speed and have equal densities. They are rigid and roll on a rigid surface. What slows them down? Air resistance and going uphill. Not friction because they are rolling, not sliding. \nWith the same initial velocity, they have the same translational momentum per unit mass. However, another factor is the angular momentum due to rolling. Let ball 1 have a radius r=1 and a mass m=1, and ball 2 have r=2 and consequently m=8. If each ball has an initial velocity of 1, ball 1's angular rate w=1 rad/sec and ball 2's w=0.5 rad/sec. The moment of inertia I of a solid sphere = k*m*r^2 (k=0.4), or I=k for ball 1 and I=32*k for ball 2. The angular momentum = I*w, thus I=k for ball 1 and I=16*k for ball 2. While both balls have the same translational momentum per unit mass, ball 2 has twice the angular momentum per unit mass and therefore a greater total momentum per unit mass, which means a greater force * time per unit mass is needed to stop it. Going uphill provides the same force per unit mass on each ball, so ball 2 goes further uphill. Air resistance per unit mass is greater for ball 1 since air resistance depends on area, and ball 1's area/mass ratio is 1 vs. ball 2's ratio of 0.5. Again, ball 2 goes farther.\nEDIT: The balls have different momentum per unit mass but the same energy per unit mass, so my argument above about uphill travel is wrong; they go the same distance uphill. But air resistance still favors the larger ball. So answer 5 is the best answer so far. Another real-life factor would be: suppose the balls are on a rough surface or face an effective drag of a surface such as a rug. A larger ball wins on both. The larger radius means smaller vertical motions for a given scale of roughness (e.g., gravel size), so less energy wasted per unit mass. And you can visualize how a deep-pile rug would stop a rolling golf ball much faster than a bowling ball.
1151411
Objects of different mass do fall at the same speed, but air resistance hinders this fact.  For example, if you drop a bowling ball and a feather at the same time on the Earth, obviously the bowling ball falls faster. \n\nHowever, on the moon, when the astronauts dropped a feather and a bowling ball, they hit the ground at the same time. \n\nIt would seem that the bowling ball should fall faster since gravity is pulling on it with more force. But, with the more mass, comes more inertia, which meas it resists being pulled more than the feather. So, the feather is pulled less, but it resists less as well, so because of that, they will fall at the same time. The relationship between the force of pull and the object's inertial compensates exactly so that all objects fall at the same rate.
436542
There was a English golf ball called Robinhood that was smaller than the American ball.  Sometimes you find them on e-bay
217138
the particles move faster.
1082534
Heard that Shaq has a small one for his size, so I am going to have to go with Kobe
418872
the faster the bat travels the farther the ball will go when hit. Players through the years have made studies of lighter bat vs heavier bat. The conclusion is that the speed of the bat is a bigger factor that the size/weight.
599797
The faster the ball goes the more it will break down hill
299681
The solid sphere will reach down first because it has a smaller rotational inertia. For the solid sphere, rotational inertia I = (2/5)*MR^2 for horrow I = (2/3)*MR^2. Where M is mass and R is radius.\n\nThe kinetic energy is K = (1/2)*I*w^2, where w is the angular velocity, I is the inertia. K is the same for both sphere since they have the same mass and position on the plane and this gives the same potential energy. When the spheres roll, this potential energy is transfered to kinetic energy k.\nFrom the equation of K, a larger "I" gives a smaller "W", and 'W' is higher for smaller "I" as K is same. so the solid sphere must reach down first as it has a smaller rotational inertia and this cause the sphere to roll faster than the other as "w" is higher.
771396
Because gravity is the same - so it has the same effect on both objects.  The larger object will strike the ground with a greater force, but both objects will accelerate at the same rate.
551875
the faster the ball goes the more it goes down
811160
In its most basic form, the softer the surface, the more energy is absorbed. The kinetic energy of the ball bouncing is used in the elastic collision between the ball and the surface it is boucing on, resulting in increasingly smaller bounces.
1060256
Airball, because you dont even hit the rim or backboard, and a brick is better because, at least you hit something.
870849
Depending on the size 3-5 mph
406946
gravity, which is only effective when the object is really big compared to the speed. the gravity of a beach ball might hold ants if it moved reaaly slow, but it would basically not be moving at all. we can escape earth gravity if we move fast enough - thats how rocket ships get into space.
227662
Khon - see - erge\n\nSay it semi-fast
462140
It depends on the size of the bird. The largest, the Giant Hummingbird, has a wingbeat rate of 10-15 per second. The fastest recorded rate was about 80 per second, on a tiny Amethyst Woodstar, and the slightly smaller Bee Hummingbird - the world's smallest bird - may have an even faster rate. Common small North American hummers like the Ruby-throated and Rufous average around 53 per second in normal flight.