MedVision ad

MOTION ! acceleration Q help (2 Viewers)

posh bitch

Member
Joined
Jun 15, 2011
Messages
50
Location
sydney
Gender
Female
HSC
2012
i am really confused.
I need help with this image that i have attached.

how do i know which part is constant acceleration ? and what is constant acc, is it the same as 0 acceleration ?
i dont know what the differece is and can someone help em locate constant acc on this displacement graph
 

Attachments

Sy123

This too shall pass
Joined
Nov 6, 2011
Messages
3,730
Gender
Male
HSC
2013
i am really confused.
I need help with this image that i have attached.

how do i know which part is constant acceleration ? and what is constant acc, is it the same as 0 acceleration ?
i dont know what the differece is and can someone help em locate constant acc on this displacement graph
Constant acceleration means that the acceleration is simply a number, like 3, 4 or whatever it might be it doesnt matter. For example
where t is time, that example above is NOT constant due to it well not being at a fixed constant value but varying according to time.

So lets translate constant acceleration into calculus terms. Constant Acceleration means that the rate of change of the gradient is constant, or rather that the concavity level is constant. But this is very hard to observe visually as we cant really tell the difference between different levels of concavity nor can we tell the rate of the change of the gradient (unless its extreme)

So I think there is something wrong here, they would never ask you to observe constant acceleration, moreover the only times given are either stationary points or inflextion points.

At the inflextion points (t2, t4, t6) acceleration is zero.
At the stationary points (t1, t3, t5) velocity is zero.
 

Users Who Are Viewing This Thread (Users: 0, Guests: 2)

Top