If a car can go from 0 to 60 mi/hr in 8.0 seconds, what would be its final speed after 5.0 seconds if its starting speed were 50 mi/hr?

Question

And thank you everyone for answering my questions!!

Answer 1

Again, we start with the question:

What would the final speed of a car be after 5.0 seconds with a starting speed of 50 mi/hr?

What is needed to solve this equation:

Acceleration of the car.

Yes that is all that is necessary.

To find the acceleration, this is where the 0-60 mi/hr in 8.0 seconds comes into play. To find the acceleration:

Acceleration = Change in velocity/Time

Acceleration = (Final velocity - initial velocity)/Time

Acceleration = (60 mi/hr - 0 mi/hr)/8.0s

Acceleration = 7.5 mi/hr/s (the unit is miles PER hour PER second)

So, now that the acceleration is known let's calculate the final velocity that the question asked for.

Rearrange acceleration formula:

Final Velocity = (Acceleration * Time) + Initial Velocity

Final velocity = (Acceleration * time) + 50 mi/hr

Final velocity = (7.5 (mi/hr)/s * 5.0) + 50 mi/hr = 87.5 mi/hr

Answer 2

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Answer 3

from 2020

Answer 4

from 2021 thanks hope its right

Answer 5

from 2022

Answer 6

Who knew that 10 years later people would still be looking up the answer to this question. 2012 to 2022. Crazy how teachers are still using the same homework sheets as 10 years ago lol

Answer 7

Thanks helped with my science homework