Calculating Negative Back Spin in Golf Ball Impact: A Sketch Guide

AI Thread Summary
Negative angular velocity, or back spin, can be calculated by analyzing the impact and launch angles when a lofted club strikes a golf ball. The relationship between the impact angle and launch angle is crucial, as they are equal and opposite. This creates a triangle involving the initial linear speed, final linear speed, and tangential rotational speed of the ball. Visualizing this with a sketch can help clarify the dynamics at play. Understanding these principles is essential for accurately calculating back spin in golf.
wdp
Messages
2
Reaction score
0
how can negative angular velocity (back spin) be calculated when the ball is struck by a lofted club?
 
Physics news on Phys.org
Can't help, man. The only thing that I know about the angular velocity of a golf ball is that no matter how I hit it, it will always travel at least 35º tangental to the direction in which the hole lies.
 
Sketch it: draw the impact and launch angles, assuming angle of impact equals (equal and opposite) the launch angle. Since the impact point is not parallel to either the impact or launch directions, a triangle is formed, with one side being the initial linear speed, one being the final linear speed and the third being the tangential (rotational) speed.

I've actually never tried, so I'm not certain of this, but it should work...
 

Thread '1:1 versus 2:1 Mechanical Advantage debate'

The rope is tied into the person (the load of 200 pounds) and the rope goes up from the person to a fixed pulley and back down to his hands. He hauls the rope to suspend himself in the air. What is the mechanical advantage of the system? The person will indeed only have to lift half of his body weight (roughly 100 pounds) because he now lessened the load by that same amount. This APPEARS to be a 2:1 because he can hold himself with half the force, but my question is: is that mechanical...
View full post »

Thread 'Average velocity as a weighted mean'

Hello everyone, Consider the problem in which a car is told to travel at 30 km/h for L kilometers and then at 60 km/h for another L kilometers. Next, you are asked to determine the average speed. My question is: although we know that the average speed in this case is the harmonic mean of the two speeds, is it also possible to state that the average speed over this 2L-kilometer stretch can be obtained as a weighted average of the two speeds? Best regards, DaTario
View full post »

Thread 'Newton's first law?'

Some physics textbook writer told me that Newton's first law applies only on bodies that feel no interactions at all. He said that if a body is on rest or moves in constant velocity, there is no external force acting on it. But I have heard another form of the law that says the net force acting on a body must be zero. This means there is interactions involved after all. So which one is correct?
View full post »

Similar threads

Moment of impact in sports, what's really going on?
Replies
4
Views
1K
B The physics of flywheel launchers (like tennis ball shooters)
2
Replies
60
Views
4K
Acceleration of golf club hitting a ball
Replies
4
Views
4K
How is initial acceleration accounted for in the impact of two bodies
Replies
4
Views
2K
I Confusion about adding angular velocities
Replies
4
Views
2K
Golf Ball Backspin: Understanding Compression and Groove Effects
Replies
12
Views
4K
How can I measure rotational speed of a golf ball and projectiles?
Replies
12
Views
4K
Golf club 🏌️and ball ⛳ impulse problem
Replies
19
Views
2K
What units are used in spin factor and coefficient of lift formulas?
Replies
3
Views
2K
How Does Angular Momentum Apply to Earth and Spinning Bike Wheels?
Replies
36
Views
4K

Hot Threads

Recent Insights

Back
Top