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#1
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Physics question: How does a minibot climb the pole?
I am not in an FRC team but I have recently started to learn about physics. So far I have learned about Kinematics and Newton's Laws of Motion and forces. I have also followed up on FRC in the 2011 season (browsed the forums and watched the competitions) and I have been curious about how a minibot goes up in general. Can anyone describe to me how a minibot can climb the pole?
Thanks! |
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#2
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Re: Physics question: How does a minibot climb the pole?
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This normal force is typically created in one of three different ways: 1) magnets 2) spring-loaded grip 3) gravity acting on the center-of-mass of the minibot, creating around a pivot point a torque which presses the minibot against the pole |
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#3
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Re: Physics question: How does a minibot climb the pole?
...and of course the 'upwards' force is greater than the 'downwards' force due to gravity.
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#4
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Re: Physics question: How does a minibot climb the pole?
In point of fact, the pole pushes the robot up.
Newton's third law... A force generated by the minibot in the vertical direction ("Down") results in a paired reaction force from the the pole on the robot in the opposite ( "UP") direction. |
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#5
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Re: Physics question: How does a minibot climb the pole?
Thanks for the responses everyone!
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Yes, that was what I was wondering about. I understand that a normal force keeps the minibot on the pole but I wasn't able to determine how that worked. I'm not sure if gravity causes the 'upward' force to be greater. The upward force would have to be greater for the minibot to go up, but the downward force is the weight of the robot which is made up of mass times gravity so the upward force needs to overcome gravity. |
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#6
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Re: Physics question: How does a minibot climb the pole?
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#7
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Re: Physics question: How does a minibot climb the pole?
Well, he did ask how it climbs the pole. If a=0 then it won't move from a standstill. But we're splitting hairs. Hares?
(Bonus points if you know the reference) |
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#8
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Re: Physics question: How does a minibot climb the pole?
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#9
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Re: Physics question: How does a minibot climb the pole?
Until Vo runs out due to g acting on it--which, I suppose, is why motors were required in the first place.
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#10
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Re: Physics question: How does a minibot climb the pole?
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Vo won't "run out" if the vertical component of the reaction force of the pole on the minibot is equal to g. |
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#11
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Re: Physics question: How does a minibot climb the pole?
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If the force acted upon the robot in the upward direction is equal to the force due to gravity, the robot will go at a constant velocity. The Vo that was mentioned is the initial velocity of the robot. In other words... if you start the robot at 1 m/s and the forces are equal the robot will continue at 1 m/s without ever slowing down or accelerating. Jason |
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#12
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Re: Physics question: How does a minibot climb the pole?
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He was saying that the "upwards force" is greater than the "downward force due to gravity". Gotta love the English language. |
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