thank you Alan, this is the rest of the question
Thank you melody and alan
Alan, for the middle question
1- you made the net force constant because the track is fricitionless ?
2- how did you determine that the acceleration is positive ?
Thank you Alan .. you are brilliant
alan I don't understand this sentence
just after point S it is large and positive; therefore the change through S is from large negative to large positive velocities. This change is positive and is larger at S than anywhere else.
thank you melody
amazing I can't explain my feeling =D ...
points P and R in the first picture ( x - t ) is a turning point but how did you know that p is the maimum velocity and R is minimum ?
the answer in the model answer is b
but the acceleration not constant here because the object covered more ground in each equal time period like the picture above
in d .. the accelearation is positive and decreasing
in f .. the acceleration is negative and increasing
right .?
What an explanaition ... I can't believe my eyes Its very wonderful You put all the states in this comment .. I will write them down on papers because they are treasure
