Baluncore's latest activity
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Baluncore replied to the thread B Why higher speeds need more power if backward force is the same?.You are assuming the path is straight, without scrub and rocks. In a rocky landscape, it is easier to run because you do not have to... -
Baluncore reacted to Hornbein's post in the thread B Why higher speeds need more power if backward force is the same? with
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Right, it seems to me that the amount of work done is the same. Lately I experimented -- Tokyo Metro has many stairs -- and felt I... -
Baluncore replied to the thread B Why higher speeds need more power if backward force is the same?.To climb 10 ft ≈ 3m up stairs requires PE = m·g·h ; If you are moving horizontally, you have KE = ½·m·v² ; If we equate those; ½·m·v² =...
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Baluncore replied to the thread B Why higher speeds need more power if backward force is the same?.I believe that running or walking makes no difference, unless you exit with a lower horizontal velocity than you entered. By using your...
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Baluncore replied to the thread B Why higher speeds need more power if backward force is the same?.The work done, is the force applied, multiplied by the distance over which the force is applied. If you are moving initially, you will...
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Baluncore replied to the thread I How do I stretch a laser from a beam into a sheet?.Use a cylindrical lens with a vertical axis, to convert the dot on a wall from a laser level, into a horizontal line on the wall.
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Baluncore replied to the thread B Why higher speeds need more power if backward force is the same?.The rate of energy flow, that an engine can convert, is its power rating. Kinetic Energy; Ek= ½⋅m⋅v² Velocity; v = √ ( 2 ⋅ Ek / m ) As...
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Baluncore replied to the thread I Calculate acceleration from power/torque graphs.But not at the instant before and after an optimum gear change, when road speed, road wheel torque, acceleration, and power are the...
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Baluncore replied to the thread I Calculate acceleration from power/torque graphs.At the high RPM end of 3rd gear, where you would change to the low RPM end of 4th gear, the torque applied by the wheel to the road...
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Baluncore replied to the thread I Calculate acceleration from power/torque graphs.Which is proportional to acceleration, but that is quite misleading, because it follows a reciprocal function on the graph, not a series...
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Baluncore replied to the thread I Calculate acceleration from power/torque graphs.Yes. The valleys in the power, that must be crossed when stepping up, or down, a gear, become deeper if there are fewer gear ratios...
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Baluncore replied to the thread I Calculate acceleration from power/torque graphs.That is due to the supported gear ratio selection, decided by the manufacturer. If you plot engine power against vehicle road speed...
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Baluncore replied to the thread I Calculate acceleration from power/torque graphs.1. Define "optimal RPM window". 2. High revs has an advantage if they have the same torque. If they have the same power, they will...
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Baluncore replied to the thread I Calculate acceleration from power/torque graphs.You have a torque to RPM graph. For each RPM being considered, multiply the torque by the gear ratio and by the differential ratio...
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Baluncore replied to the thread I Calculate acceleration from power/torque graphs.Welcome to PF. There is something wrong with that torque against RPM graph. Power is the product of torque and RPM, so the power and...