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"5 Minutes Daily" Practice Challenge 1 2 3 4 977
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By cedrictheo · Posted
Wow, @DeadMan that is such a helpful breakdown of what’s around. Really excited to check a bunch of these out. Thank you. Will definitely go to Walnut Creek. Will also try and get a commonground tee time. Haven’t played many Doak courses yet! If your schedule frees up, let me know! -
Yeah. I'm not sure what Vishal is really talking about with the "constrained" COM. The club's COM doesn't really change much. Less than the body's does… We definitely apply force to the golf club to move it both translationally (linear force) and rotationally (torque) to the golf club. That's what Manzella's alpha/beta/gamma is all about. Even before they switched the reference frame from the global to the club-based one. 😉 -
Any time you apply a force to an object that is not directly through the COM, you're applying a torque. Take a car for example. If a car is moving and you hit the brakes, the only contact point is on the ground. The brakes make the tires slow down which applies a force backwards at ground level. Since that force is not applied directly to the COM, it also applies a torque, which makes the car rotate forwards. The suspension at the front applies another torque upwards to fight against that twist (because the ground is in the way). You can feel the front end of the car dip when you brake. Then, when you stop braking and that force is no longer applied, the tires stop applying that torque to the car and the car feels like it rocks backwards as the suspension evens itself out. That's all torques being applied. Ignoring the twist forces applied to the club leaves you way short of being able to describe the motion. Otherwise the orientation of the club would never change. -
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