## Emineyy A dragster travels 1/4 mi in 6.7 s. Assuming that acceleration is constant and the dragster is initially at rest, what is its velocity when it crosses the finish line? Please show step by step... 5 months ago 5 months ago

1. campbell_st

so use $average ..speed = \frac{distance..travelled}{time..taken}$

2. Emineyy

I tried but my answer was wrong.) I got 267 mi/h??

3. campbell_st

did you try feet/sec..?

4. campbell_st

5. campbell_st

1/4 mile = 5280/4 = 1320 ft avg speed 1320/6.7 = ...

6. campbell_st

even using 0.25/6.7 will give miles/sec then multiply by 60 to get miles/min then multiply by 60 to get miles/hr

7. Emineyy

the answer is given it's 269 mi/h ???

8. campbell_st

wow...