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i need help with physics!!?
you drive 252 km/h for a half-hour and then drive 36km/h for and hour and a half
what is your average speed (GIVE UNITS)
question 2
it is 3:00 pm your car's odometer reads 600 kilometers. you drive steadily at 88 km/h
at 6:00 pm, what does the odometer read? (INLCUDE UNITS IN YOUR ANSWER)
3 Answers
- Anonymous1 decade agoFavorite Answer
Calculate the total distance covered divided by the total time it took to cover that distance.
Total distance:
(252 km/h)(0.5 hr) + (36 km/hr)(1.5hr) = 180km
Total time
(0.5 + 1.5) hours = 2 hours
average speed = (180 km) / 2 hours = 90 km/hour
For Question 2--- NEXT TIME, PUT INTO ANOTHER QUESTION. I almost missed this one.
The time that you traveled is 3 hours (from 3:00 to 6:00)
Speed is 88 km/hr
Distance - (88 km /hr)(3 hr) = 264 km
New odometer reading: 600 + 264 = 864 km
- FiremanLv 71 decade ago
1st Phase:-
t1 = 0.5 hr
=>s1 = v1 x t1 = 252 x 0.5 = 126 km
2nd Phase:-
t2 = 1.5 hr
=>s2 = v2 x t2 = 36 x 1.5 = 54 km
Average speed(v) = (s1+s2)/(t1+t2)
=>v = (126+54)/(0.5+1.5)
=>v = 90 km/hr
