Free fall and slide, gained speed?

AI Thread Summary
The discussion centers on comparing the speeds of two objects reaching the ground: one in free fall and the other sliding down an inclined plane. Both scenarios utilize the conservation of energy principle, leading to the conclusion that their final velocities are equal when friction is negligible. The impact of friction is debated, with a suggestion that an icy inclined plane could minimize friction to the point of being negligible. Ultimately, the analysis emphasizes that, under ideal conditions without friction, both objects would reach the ground simultaneously. The conversation highlights the importance of considering external factors like friction in real-world applications.
jaguar___
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Homework Statement


which one would be faster when reached the ground?

Homework Equations

The Attempt at a Solution


conservation of energy
Pe=Ke
mgh=1/2mV^2
for 2-)m*g*cosa*(h/cosa)=1/2*m*V^2 -- V= sqrt(2*g*h)
for 1-) V=sqrt(2*g*h)
so V1=V2
 

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jaguar___ said:

Homework Statement


which one would be faster when reached the ground?

Homework Equations

The Attempt at a Solution


conservation of energy
Pe=Ke
mgh=1/2mV^2
for 2-)m*g*cosa*(h/cosa)=1/2*m*V^2 -- V= sqrt(2*g*h)
for 1-) V=sqrt(2*g*h)
so V1=V2
I think that would be true in the absence of friction.
 
can we say if the inclined plane is ice and also the weights are ice there wouldn't be friction? or so small that can be ignored?
 
jaguar___ said:
can we say if the inclined plane is ice and also the weights are ice there wouldn't be friction? or so small that can be ignored?
You can say anything you want. Does it make sense in the context of the situation?
 
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