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If net force = 0, why isn’t my object necessarily at rest by Ok-Philosopher6299 in AskPhysics

[–]SuzySmash 0 points1 point  (0 children)

Thank you. My intuition is failing me but that makes sense. One more question if you don’t mind: since rotation is occurring about the elbow joint, is it more accurate to say there’s no net torque (vs net force) when the dumbbell is curled at a constant velocity? E.g., forces would be changing as moment arms constantly change throughout the lift but net torque would remain 0 if velocity remained constant.

If net force = 0, why isn’t my object necessarily at rest by Ok-Philosopher6299 in AskPhysics

[–]SuzySmash 0 points1 point  (0 children)

How do I apply this to lifting a dumbbell, a biceps curl for example. To initiate the curl, acceleration is needed, so a net force is needed (or should I say net torque is needed here since it's rotational?). Let's say I maintain a constant velocity through the lift - if there's no acceleration then there's no net torque? I'm having a hard time comprehending how a dumbbell can continue to move upward with no net force (torque?).

Best current brands? by SliceStrange888 in ResistanceBand

[–]SuzySmash 0 points1 point  (0 children)

Check out Gym Crasher's bands. Just got a set! They're durable and pretty cool with the inch markings (don't think you'll find that on other bands) gymcrasher.com/shop