How Long Until You Reach the Curve at 180.7 km/hr?

[rupz28]

Homework Statement

Traveling at a speed of 180.7 km/hr, you only have about 1/2 km until you reach the curve. At this speed, how many seconds do you have until you reach the curve? Don't forget to convert your answer to the correct units.

Homework Equations

t = d/v ??

The Attempt at a Solution

.5km / 180.7km/hr the km's cancel out and the result is 0.00276 hr

To convert to the units, taking 3600 seconds and multiply by 0.00276 = 9.936 seconds to reach the curve.

Is this correct?

Thank you,
z28

 

[Chi Meson]

This is correct-ish.

Does your teacher care about "significant figures" (aka "sig figs")?

Because the speed is given to four digits, but the distance given is only "about 1/2 km" which is only a single sig fig. That means your answer, which is precise to the thousandth of a second, contains too many digits to be of any use.

 

[rupz28]

Oh, yes, I see. Thank you