What is the initial velocity of a golf ball?
Golf Channel Chief Technical Advisor Frank Thomas has the answers. Quoting Thomas, the former technical director of the USGA and founder of FranklyGolf.com: “The Initial Velocity (IV) test is based on the speed the ball leaves a steel striker attached to a wheel weighing approximately 200 pounds and traveling at just under 98 mph.
How fast does a golf ball hit the ground?
Typically for a 100mph swing speed (using an 11-degree lofted driver, a 200-gram head weight, a 0.825 COR, and a perfect on-center hit), the ball velocity at impact will be approximately 148 mph. But by the time the ball hits the ground, the ball's speed has dramatically dropped to only 47.5 mph!
Why does the speed of a golf ball decrease while flying?
This is largely due to friction between the ball and the air while in flight, which is also compounded by the ball's backspin causing even more friction. The result is that the speed decays while the ball is in the air.
What is the X and Y coordinates of the golf ball?
"A golf ball is hit off a tee at the edge of a cliff. It's x and y coordinates versus time are given by the following expressions: x = (18 m/s) t and y = (4 m/s) t– (4.9 m/s 2 ) t 2.
What is the velocity of a ball at rest?
0 -The vertical velocity is 0 - and thus the ball is instantaneously at rest (in the vertical direction) - at the very moment the ball reaches its maximum height.
What is the initial velocity when starting from rest?
when a body starts from rest, its initial velocity is zero.
What is the velocity at the start?
Initial Velocity is the velocity at time interval t = 0 and it is represented by u. It is the velocity at which the motion starts.
What is the final velocity of the ball just before it hits the ground?
Calculate the final free fall speed (just before hitting the ground) with the formula v = v₀ + gt = 0 + 9.80665 * 8 = 78.45 m/s .
How do you find final velocity?
Final velocity (v) of an object equals initial velocity (u) of that object plus acceleration (a) of the object times the elapsed time (t) from u to v. Use standard gravity, a = 9.80665 m/s2, for equations involving the Earth's gravitational force as the acceleration rate of an object.
When an object is at rest what will its velocity be?
An object at rest is one with zero velocity.
How do you find final and initial velocity?
How do you find final velocity?Work out which of the displacement (S), initial velocity (U), acceleration (A) and time (T) you have to solve for final velocity (V).If you have U, A and T, use V = U + AT.If you have S, U and T, use V = 2(S/T) - U.If you have S, A and T, use V = (S/T) + (AT/2).
How do you find final velocity without time?
1:513:16Physics: That Equation, finding final velocity without time - YouTubeYouTubeStart of suggested clipEnd of suggested clipSo now I bring out my calculator here. And I'm gonna take 80 times negative 9.8. So 80 timesMoreSo now I bring out my calculator here. And I'm gonna take 80 times negative 9.8. So 80 times negative 9.8. That's gonna give me 784.
How do you know what is final velocity and initial velocity?
Initial velocity describes how fast an object travels when gravity first applies force on the object. On the other hand, the final velocity is a vector quantity that measures the speed and direction of a moving body after it has reached its maximum acceleration.
What is the velocity of the ball before it is dropped?
Conclusion: The magnitude of the velocity of the ball is 26.3 m/s for the parabolic motion just before it hits the ground and this greater than the 17.1 m/s for the velocity of the ball that falls straight downward.
What is the ball's initial velocity?
The ball's initial velocity is the one measured at its highest point and its final velocity is the one right before it hit the ground, going downwards. In this case, the up is positive so having a negative displacement would mean it went down from its initial position.
What is the velocity of the ball at the top of its path?
zero velocityAt the highest point in its trajectory, the ball has zero velocity, and the magnitude of velocity increases again as the ball falls back toward the earth (see figure 1).
What does it mean when an object travels with an initial velocity?
If the object is already traveling with an initial velocity, you have to take it into account, too: You can immediately see that the object distance traveled is proportional to the fall time squared. It means that with each second, the falling body travels a substantially larger distance than before.
How to calculate free fall acceleration?
How do you find free fall acceleration of a planet? 1 Estimate the total mass of the planet in kilograms. 2 Estimate the radius of the planet, from its center to its surface, in meters. 3 Divide the total mass by radius squared. 4 Multiply the result by the universal Gravitational constant, 6.67×10 -11 N·m 2 ·kg -2. 5 The result is the gravitational force of the planet, which is also its free fall acceleration.
What is the difference between weightlessness and free fall?
Free fall is when an object is falling, only being affected by the force of gravity, while weightlessness is when an object has no weight due to there being no effect from gravity (it still has mass). Weightlessness can be achieved either in space or if an equal force can be applied in the opposite direction of gravity.
What is the only force that moves an object in free fall?
In free fall, an object moves under the influence of gravitational force only. The only acceleration is the acceleration of gravity g. No other force, including air resistance, is acting on such an object. Interestingly, an object in free fall doesn't necessarily need to be falling (that is, moving downwards).
How to determine the weight of an object in free fall?
An object in free fall will still have a weight, governed by the equation W = mg, where W is the object’s weight, m is the object’s mass, and g is the acceleration due to gravity. Weight, however, does not affect an object's free falling speed.
Why does the Moon move in a tangential orbit?
It's because Moon's speed is not directed towards Earth, but tangentially to its orbit. Since the Moon is moving along an elliptic orbit with the first cosmic velocity, its motion generates a centrifugal force, equal and opposite to the force of gravity.
Does the distance depend on the mass of the falling object?
Another interesting fact is that according to the free fall formula, the distance does not depend on the mass of the falling object. If you drop a feather and a brick, they will hit the ground at the same time...
