- #1
Mark-01
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I am trying to create a lever which has mass on one end and i need to lift the lever. A picture showing the lever setup is in this link: https://imgur.com/WeH4oK7
The system is like seesaw ( from -20 degrees to +20 degrees at constant angular velocity for time period 't') The input angular velocity and effort end length is same while load and load distance is varied (though load * load distance is constant). I am confused by which method should I solve the problem to find required input power.
I have come up with this much of thinking:
1> Assuming radial acceleration is effective:
Power(P)
= Torque * angular velocity(omega)
= Force * force distance(r) * omega
= [m * (v^2 /r) ]* r * v/r
= m * v^3 /r
2> Neglecting radial acceleration since the horizontal component is small and the motion is not continuous circular but more like seesaw:
P = Work done / time taken
= F * d / t
= m * v/t * d/t
= m * v^2 /t
Which one should I use or if my approach has mistakes, kindly help me get through it.
The system is like seesaw ( from -20 degrees to +20 degrees at constant angular velocity for time period 't') The input angular velocity and effort end length is same while load and load distance is varied (though load * load distance is constant). I am confused by which method should I solve the problem to find required input power.
I have come up with this much of thinking:
1> Assuming radial acceleration is effective:
Power(P)
= Torque * angular velocity(omega)
= Force * force distance(r) * omega
= [m * (v^2 /r) ]* r * v/r
= m * v^3 /r
2> Neglecting radial acceleration since the horizontal component is small and the motion is not continuous circular but more like seesaw:
P = Work done / time taken
= F * d / t
= m * v/t * d/t
= m * v^2 /t
Which one should I use or if my approach has mistakes, kindly help me get through it.