analytical problem

[odd gale]

halp

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[odd gale]

a obvioulsy 200ft/s

for b. i got:

speed @t=8 is decreasing
speed @t=12 is decreasing
speed @t=15 increasing?

c. 100 ft/s because speed is a scalar, not a vector so the quantity cannot be negative

[rancid finch]

speed at t=12seconds is increasing and at t=15seconds is decreasing

[odd gale]

wait how

at t=12 wouldn't it be increasing negatively

but for math it would be decreasing in terms of it's relativity to 0?

[rancid finch]

it asked for speed not velocity

velocity is decreasing as its becoming more negative but speed which is absolute value(magnitude) of velocity is increasing

kinda like how -4 > -5 but |-4| < |-5|

[odd gale]

ohhh shooot

[rancid finch]

answers for the rest are :-
d)3 seconds
e)0 to 3 seconds

[odd gale]

it's speed you're right

[odd gale]

would 0 to 3 be a better answer than 2 to 3

or should i say 2 to 3 seconds to be precise

i didn't think about it being from 2 to 3 until my friend pointed it out

[rancid finch]

they didnt mention how long the interval is so question is ambiguous
u could even mention 0 to infinity and you would be right technically since the rocket achieved its greatest accelaration somewhere in between
i think 0 to 3 is a better answer since it covers the complete part where the rocket is firing its motor
but if we have only 1 second intervals than 2-3 is best answer

[odd gale]

i see, thanks for explanation

[odd gale]

+close