- #1
TheColector
- 29
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Suppose we have an inclined plane and 2 wheels. Both wheels have the same mass M but different radius R.
So the only difference is that one is bigger than another. We put both wheels on the top of the inclined plane. They are in the same position, and then we let them go. I know that the wheel with bigger radius will reach the bottom of the inclined plane faster than the smaller one. It also accelerates faster.
Here I need a little of your help. The thing I don't know/understand is why does the bigger radius wheel accelerates faster, why does it reach the bottom of the inclined plane faster ? Should both wheels reach the same max velocity ?
Now tell me if I'm wrong. In my opinion both wheels have the same force F1 where F1 = mg * sinα - force which pulls down.
By the definition of Torque which is
. we have the same F1 force and different Radiuses.
In conclusion the bigger wheel has larger Torque value than small wheel, and both wheels need the same force to move but bigger radius means larger Torque value, so it's easier to gain acceleration and starts moving faster. It's one of my thoughts. Sorry for long post, I'm new here, hope you'll understand
So the only difference is that one is bigger than another. We put both wheels on the top of the inclined plane. They are in the same position, and then we let them go. I know that the wheel with bigger radius will reach the bottom of the inclined plane faster than the smaller one. It also accelerates faster.
Here I need a little of your help. The thing I don't know/understand is why does the bigger radius wheel accelerates faster, why does it reach the bottom of the inclined plane faster ? Should both wheels reach the same max velocity ?
Now tell me if I'm wrong. In my opinion both wheels have the same force F1 where F1 = mg * sinα - force which pulls down.
By the definition of Torque which is
In conclusion the bigger wheel has larger Torque value than small wheel, and both wheels need the same force to move but bigger radius means larger Torque value, so it's easier to gain acceleration and starts moving faster. It's one of my thoughts. Sorry for long post, I'm new here, hope you'll understand