Physics question

[p.dath]

p=mv

where:
p=momentum
m=mass
v=velocity

If all other factors are the same (as you say they are), meaning the momentum remains constant, then if the mass increases the velocity must decrease.

[steve_t]

So if I throw a feather and a 1988 Mazda 323 S/W (with one careful owner) out of a plane the Mazda won't win?

EDIT: Depends from what height I suppose - anyway...

The Mythbusters guys dropped a feather and a bowling ball in a vacuum and, yes, they fell at the same rate. A feather only falls slower due to the 'wind resistance' it has.

p=mv

where:
p=momentum
m=mass
v=velocity

If all other factors are the same (as you say they are), meaning the momentum remains constant, then if the mass increases the velocity must decrease.

2 objects travelling at the same velocity with different mass have different momentum. This doesn't mean their terminal velocity is different

[p.dath]

e(k)=1/2 mv^2

where:
e(k)=Kinetic Energy
m=mass
v=velocity

Assuming both engines can put out the same amount of energy, then once again, if mass increases velocity must reduce.

So on several levels, if you increase the mass the velocity must go down.

[steve_t]

e(k)=1/2 mv^2

where:
e(k)=Kinetic Energy
m=mass
v=velocity

Assuming both engines can put out the same amount of energy, then once again, if mass increases velocity must reduce.

So on several levels, if you increase the mass the velocity must go down.

Best to consider the skydiving analogy again

[crazyhorse]

This is the very reason I left school -

[Morepower]

Best to consider the skydiving analogy again

but the aerodynamics was different. If both cars are equal in every way than the heavier car will be slower , even if its only slightly.

As Scotty says , You canna change the laws of physics captain

[LBD]

Galileo proved otherwise.

Galeleo or Newton?

Two articles same shape and density but diffferent sizes, accelerate and fall at the same rate. Two articles same size and shape, but one of greater mass will fall at different rates, if falling through the same atmosphere....

[RDjase]

The Mythbusters guys dropped a feather and a bowling ball in a vacuum and, yes, they fell at the same rate. A feather only falls slower due to the 'wind resistance' it has.

Adam and Jamie have a great job on MythBusters aye, and there never short on explosives

[steve_t]

OK, I googled it and there are some pretty big formulas given by some physics guys. They also agreed that the max speed for the heavier car will be slightly less (1-2mph (that's their units, not mine, I'm km/h)) but only due to increased drag in the tyres, bearings, and drivetrain.
Feel free to google it yourself
As crazy horse has said

[crazyhorse]

Yahhhhhh..... Go Steve_T

[p.dath]

Galeleo or Newton?

Two articles same shape and density but diffferent sizes, accelerate and fall at the same rate. Two articles same size and shape, but one of greater mass will fall at different rates, if falling through the same atmosphere....

But these objects are not being accelerated by gravity alone, so this does not apply in this case.

In this case the energy is being supplied by an engine. I've assumed the energy output of the engines remains constant in both cases (since that was what was said). If the energy output remains the same, then the two vehicles will not accelerate at the same rate.

[Big Dave]

Galeleo or Newton?

Two articles same shape and density but diffferent sizes, accelerate and fall at the same rate. Two articles same size and shape, but one of greater mass will fall at different rates, if falling through the same atmosphere....

Galileo.

9.80665 meters per second per second at seal level. Grape or grapefruit.

[The Stranger:Me]

This is the very reason I left school -

We have a winner!

[p.dath]

9.80665 meters per second per second at seal level. Grape or grapefruit.

But the two cars are not falling. The acceleration at the earth's surface has nothing to do with this issue.

These two vehicles are being propelled along a straight line along the earth's surface under their own power.

Terminal velocity will occur when the energy output of the two engines is effectively matched by the energy loss caused by wind resistance and friction.

[Big Dave]

But these objects are not being accelerated by gravity alone, so this does not apply in this case..

Crossed purposes - some are meaning dropping from the plane - the plane.

you're still driving to the airport.