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May/June 2014
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∙ 10y ago
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Suppose you roll a ball off a table top will the time to hit the ground depend on the speed?
If you are talking about the speed at which you roll the ball along the table before it falls of, it will not affect the time it takes to reach the floorAlso, if you are starting your measuring of time from when you started the roll until it hits the ground or if you are starting the measurement from when it falls of the table until it hits the ground will make a difference.If you are just measuring the time it takes from when it left the table until it hits the floor, the speed of the roll will have no effect.
If two identical balls roll off the edge of a horizontal table top and one leaves traveling at twice the speed of the other then which ball hits the floor first?
Both ball hit the floor at the same time. They both have the same vertical acceleration component, i.e. gravity, at work on them. Both will fall with an acceleration of approximately 9.81 m/s^2. Their horizontal speed component plays no part in bringing the balls to the floor.
What is the total mechanical energy of a glass of milk falling off a table at a time when its potential energy is 15j and its kinetic energy is 12j?
27 Joules
A ball rolls off the end of a table with a speed of 2 mpers It hits the ground after 3 s If the tableop is 1 m from the floor what was the horizontal distance from the end of the table traveled by?
Hold up, whoa ! Just wait a second there.If the table-top is 1 meter from the floor, then the ball hits the floor 0.45 seconds after itrolls off the edge of the table. The horizontal speed makes no difference.A cannonball fired horizontally from the cannon and a cannonball dropped from the muzzleof the cannon hit the ground at the same time. Horizontal speed doesn't keep anything upany longer than if it drops straight down with no horizontal speed.If the ball is rolling horizontally along the table at 2 m/s, then it falls to the floor 0.45 secondsafter it reaches the edge, and in that period of time, it sails (2 x 0.45) = 0.9 meter out past theend of the table.
Will a fast ball hit the floor faster than a slow ball when it falls off a table?
If two balls just fall off a table, none will be faster than the other.If one of the balls initially has a horizontal speed, and the other doesn't, or if one is faster in the horizontal direction than the other, then they should reach the floor at the same time.
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