The problem involves determining the constant deceleration required for a motorcycle to brake from 30 mph (44 ft/sec) to a complete stop over a distance of 45 feet, without using physics formulas.
The discussion is ongoing, with participants providing insights into the relationships between variables and questioning assumptions about the equations used. Some guidance has been offered regarding the definitions of variables and the implications of the equations presented.
Participants are restricted from using physics formulas, which influences their approach to the problem. There is also a focus on ensuring that the final position is accurately defined within the context of the problem.
If the equation is v(t) = 44t + v_0, the motorcyclist will be speeding up, not slowing down.htoor9 said:Homework Statement
The State cycle program requires motorcycle riders to be able to brake from 30 mph(44ft/sec) to 0 in 45 feet. What constant deceleration does it take to do that? No physics formulas allowed.
Homework Equations
Integral rules and whatnot
The Attempt at a Solution
I think v(t) = 44t + V0 but I don't know. I'm just really stumped
Mark44 said:If the equation is v(t) = 44t + v_0, the motorcyclist will be speeding up, not slowing down.
What you have is
[tex]\frac{d^2 s}{dt^2} = - a[/tex]
where a is a positive constant, and v(0) = 44 (ft/sec). You can define s(0) however you want, just so that s(final) is 45 feet away.
CompuChip said:Does that give you 44 ft/sec if you plug in t = 0?
What is v0?