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If water falls over a dam 300 feet high what would its velocity be just before striking the bottom if air resistance is ignored?
Wiki User
∙ 16y ago
V = SQRT(2gh), where g is the acceleration of gravity and h is the height.
Wiki User
∙ 16y ago
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How does the weight of a falling body compare with the air resistance it encounters before it reaches terminal velocity?
The weight exceeds the force of air resistance, but as the speed increases the air resistance increases, so the net force (weight - air resistance) falls. When the difference becomes zero the acceleration ceases and you have terminal velocity.
What happens to the horizontal velocity of a ball after it rolls off a table?
The horizontal velocity will be equal to the translational velocity of the ball right before it falls off the table. ============================== When we do exercises that deal with the behavior of the ball after it leaves the edge of the table, we always ignore air resistance. When we do that, the horizontal component of velocity remains constant forever, or at least until the ball hits something.
Will an object dropped on the moon reach a terminal velocity?
That varies, depending on the object. A massive object may take a long time to reach terminal velocity; a less massive object will reach terminal velocity faster. It basically depends on the object's mass, size, and shape.
What happens before terminal velocity takes place?
Before reaching terminal velocity, an object will fall faster and faster.
When the speed an object reaches the force of gravity is balanced by the force of air resistance called inertia?
This is called Terminal Velocity. Gravity pulling downwards matches the air resistance pushing upwards to cancel the acceleration out. Many people misunderstand this and believe that this means that the object falling is no longer moving, but it is speaking in terms of acceleration, not speed. So the acceleration from before terminal velocity was reached will still be in affect, but the object will be neither gaining or losing speed.
Why is terminal velocity with a parachute open less than the terminal velocity before it was open?
because there is more air resistance
How does the weight of a falling body compare with the air resistance it encounters before it reaches terminal velocity?
The weight exceeds the force of air resistance, but as the speed increases the air resistance increases, so the net force (weight - air resistance) falls. When the difference becomes zero the acceleration ceases and you have terminal velocity.
When was Close Cover Before Striking created?
Close Cover Before Striking was created on 2002-10-08.
What happens to the horizontal velocity of a ball after it rolls off a table?
The horizontal velocity will be equal to the translational velocity of the ball right before it falls off the table. ============================== When we do exercises that deal with the behavior of the ball after it leaves the edge of the table, we always ignore air resistance. When we do that, the horizontal component of velocity remains constant forever, or at least until the ball hits something.
What is the formula for perfectly elastic collision?
Total momentum before = total momentum afterTotal kinetic energy before = total kinetic energy afterSum of x-components of velocity before = sum of x-components of velocity after.Sum of y-components of velocity before = sum of y-components of velocity after.Sum of z-components of velocity before = sum of z-components of velocity after.
Which amendments we ignored?
The amendments are not ignored. They are used daily in court and cases that come before the Supreme Court.
Will an object dropped on the moon reach a terminal velocity?
That varies, depending on the object. A massive object may take a long time to reach terminal velocity; a less massive object will reach terminal velocity faster. It basically depends on the object's mass, size, and shape.
A 12 kg rocks falls from rest off a cliff and hits the ground in 1.5 s.without considering air resistance what is the rock s velocity just before it hits the ground?
The velocity is gravity acceleration x time or (9.8)(1.5) = 14.7 m/s. The velocity is not dependent on the mass.
Can tsunamis be stopped before striking?
No. Tsunamis cannot be stopped.
What animal is named for a sound that it makes before striking?
Rattlesnake
What is maximum velocity?
maximum velocity is the highest possibly speed an object can travel before the forces acting on it reach an equilibrium and it is no longer able to accelerate. For example a parachutist will fall and accelerate rapidly until the air resistance pushing upwards against her downward force becomes balanced and her speed is steady, its more commonly known as 'terminal velocity' not maximum.
What happens before terminal velocity takes place?
Before reaching terminal velocity, an object will fall faster and faster.
