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How do you convert m/s^2 to km/h?

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- Thread starter Kdawg
- Start date

- #1

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How do you convert m/s^2 to km/h?

- #2

plover

Homework Helper

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- #3

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well you can if you have the delat t of a

- #4

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I do it like such

((36km/60)/60)*1000

which is equal to 10ms^-1

Theres some really easy way to do it, but this one never fails and it doesnt take that much longer so i just use this one.

- #5

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A bus traveling at +29 km/h accelerates at a constant +3.7 m/s2 for 6.3 s. What is its final velocity in km/h?

This is my work so far, what am I doing wrong.

Vi = 29Km/h

a = 3.7m/s^2

t = 6.3s

Vf = ?

Vf = Vi + at

Vf = 29 + 3.7 * 6.3

Vf = 52 - With right sig figs

- #6

plover

Homework Helper

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Looks good to me.

- #7

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Thats what I thought but the damn webassign keeps marking it wrong.

- #8

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Vf = Vi +at

SI UNITS!

Velocity SI unit is ms^-1

Therefore 29kmh^-1

Needs to be converted to ms^-1

- #9

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What is its final velocity in km/h?

And then convert it back

And then convert it back

- #10

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- #11

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then converted that to 110. That obviously isnt right, what am I doing wrong.

- #12

plover

Homework Helper

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Bleah. Of course. I wasn't looking at the units.

- #13

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- #14

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Kdawg said:

then converted that to 110. That obviously isnt right, what am I doing wrong.

Try evaluating this again I don't seem to get the same answer for 8.05556+(3.7*6.3) as you do.

(and hence the converted figure is different as well)

- #15

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KaneOris said:

This really depends on how hard you put your foot on the accelerator (or how good your car is!)

- #16

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