The discussion revolves around the physics of an object falling off a cliff, specifically addressing the assumptions regarding final velocity (Vf) in both horizontal and vertical directions when initial velocity (Vox) is provided. Participants explore the implications of these assumptions in the context of a car driving off a cliff and the calculations involved in determining its initial velocity based on the distance of impact.
The discussion is active, with participants providing differing viewpoints on the assumptions regarding final velocity. Some have offered reasoning against the assumption of Vf being zero, while others are exploring the implications of this assumption in the context of the problem.
There is a focus on the interpretation of final velocity in relation to the impact scenario, with some participants expressing confusion over the terminology used in the original question. The discussion reflects a need for clarity on the definitions and assumptions being made in the problem setup.
Chiralic said:Homework Statement
If you have an object, say, falling off a cliff
and you have initial velocity (Vox) can you assume that its Vf would be zero in both x and y if it doesn't state or ask for a final velocity before impact?
eg) a car drives off a cliff and the site of impact is 32 m from the cliff, find Vo...can I assume Vf is 0?
thanks
Homework Equations
The Attempt at a Solution
Why in the world would you assume that? Falling bodies accelerate. The final speed of a body falling off a cliff will always be greater than its initial speed--not zero!Chiralic said:If you have an object, say, falling off a cliff
and you have initial velocity (Vox) can you assume that its Vf would be zero in both x and y if it doesn't state or ask for a final velocity before impact?
eg) a car drives off a cliff and the site of impact is 32 m from the cliff, find Vo...can I assume Vf is 0?