constant acceleration formalism

nobbo

constant acceleration formalism? Can anybody tell me what this is? Its on a mechanics question im trying to do? I failed applied maths and studying for the repeat.

Thanks soooo much in advance

Morbert

nobbo wrote: »

constant acceleration formalism? Can anybody tell me what this is? Its on a mechanics question im trying to do? I failed applied maths and studying for the repeat.

Thanks soooo much in advance

What's the context? My guess is it refers to systems where da/dt = 0.

sponsoredwalk

There is a set of equations that can be derived in order to deal with a system
moving with constant acceleration. Most likely this is the formalism you're
talking about.

nobbo

This is the question..

A particle travels a distance of 300 m in a straight line at an average speed of
4 m/s, going from rest with constant acceleration a1 for 10 s, then moving with
constant speed and then coming to rest with a constant retardation a2 for the last
20 s of the motion.
Using the constant acceleration formalism for each stage of the motion, find what
must be the values of a1 and a2.
Deduce, also, how far the particle travels while accelerating, while travelling at a
constant velocity and while decelerating.

japester

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CropperCapture[80].jpg


Hope this helps ,
Japes

raah!

It probably means just the equations of motion for when a particle is moving with constant acceration. These are the one's mentioned by sponseredwalk, and are written as follows in the leaving cert:

v = u + at, s=ut +at^2/2, v^2=u^2 + 2as etc.

For these questions it was recommended to draw the velocity time diagram to help you with the poblem. At least this was standard practice for my class at the time.