Asked by Cassie

2. Once your rocket reaches space, the captain adjusts the speed. Your captain goes from 24,000 km/hr to 17,000 km/hr over 90 seconds. What is your acceleration?
Beginning speed= 17,000km/hr
Ending speed= 24,000 km/hr
Time it took= 90/sec


17000-24000= -7000/90= -77.778km/hr

Should it be ^2?

Please Check

Thank you.
Answered by Cassie
I just need someone to look at this and tell me if it is correct or if I have to convert anything - I am unsure
Answered by Devron
You have a mistake: the rate is given in units of km/hr, but the time is given in seconds. You have to convert 90seconds to hours before proceeding with the calculations.

90 seconds*(1 min/60 seconds)*(1 hr/60 minutes)= time in hours.

(17,000km/hr-24,000km/hr)/time in hours=correct answer
Answered by Devron
Report your answer as --- km/hr^2.
Answered by Cassie
Devron is it 280,000 km/hr^2??
Answered by Devron
Yes and no, since the rocket is decelerating. So, is the final answer 280,000 km/hr^2 or is it - 280,000 km/hr^2?
Answered by Devron
You could have just had a typo, but I just want to make sure that you understand.
Answered by Cassie
it's -280,000 km/hr^2
Answered by Devron
Bingo!!

Best and good luck.
Answered by Cassie
Thank you so much Devron - I really appreciate your help.
Answered by Devron
i used to come back every year to see if you were still here. I wonder how you are doing.
I'm now a college student lol
Answered by some girl
awwwDevron that’s so sweet i wonder what’s cassie doing
Answered by Drilla
She most likely getting her back blown out rn, but who knows
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