How come? If there are two engines wouldn’t this double the potential speed?
They're trying to move twice the mass.How come? If there are two engines wouldn’t this double the potential speed?
If you join two trains that are capable of 120 mph together to make one big train, does this mean that the maximum speed of the big train increases to 240 mph as there are two engines?
Doubling the speed does indeed increase the force of air resistance by a factor of four, which means that the power of the air resistance increases by a factor of eight (since work done equals force times displacement, which differentiated by time makes power equal force times velocity, or in other words, output force equals output power divided by velocity).Need to realise that doubling the speed means 4 times greater air resistance (as is kinetic energy) even doubling power of one train will not double its speed because of this.
That's a different situation since the energy required to move legs back and forth is the factor which primarily limits how fast people can run (and is why cyclists have a greater top speed than runners). So holding hands provides no benefit.If two runners hold hands, can they run twice as fast as either of them could run alone?
My ex-wife used to borrow the neighbours collie dog when she went running ...........when she had hold of its lead she definitely went twice as fast.If two runners hold hands, can they run twice as fast as either of them could run alone?
No, because physics. I'm assuming you mean using two locos. It takes much more than twice the power to double speed. Also, adding a loco means adding the weight of that loco as well. Coupling two multiple units won't make much difference to speed because the power to weight ratio stays the same.How come? If there are two engines wouldn’t this double the potential speed?