# Physics

posted by .

I have no idea how to do this. Anyone help?

A cyclist passes a race check point at +5.5m/s and then accelerates ata constant rate of +.55 m/s^2. The cyclist forgot to check in at the check point, and after 20s turns back around to head back. How far did the cylist move from the check point to the point of turning back?

• Physics -

After 20 s, the speed increased from 5.5 m/s to
5.5 m/s + 0.55*20 = 11.5 m/s

The average speed during the 20s was
(11.5 + 5.5)/2 = 8.5 m/s

Multiply that by 20 s for the distance travelled.

## Similar Questions

1. ### Math

A cyclist and a jogger start from a town at the same time and head for a destination 6 mi away. The rate of the cyclist is twice the rate of the jogger. The cyclist arrives 3 hr ahead of the jogger. find the rate of the cyclist. This …
2. ### SCIENCE

A cyclist maintains a constant velocity of 5.2 m/s headed away from point A. At some initial time, the cyclist is 257 m from point A. What will be his displacement from his starting position after 47 s?
3. ### physics

A cyclist maintains a constant velocity of 5.4 m/s headed away from point A. At some initial time, the cyclist is 250 m from point A. What will be his displacement from his starting position after 86 s?
4. ### physics

A cyclist maintains a constant velocity of 5.9 m/s headed away from point A. At some initial time, the cyclist is 242 m from point A. What will be his position from point A after that time?
5. ### physics

A cyclist maintains a constant velocity of 4.8 m/s headed away from point A. At some initial time, the cyclist is 255 m from point A. What will be his displacement from his starting position after 88 s?
6. ### physics

A cyclist maintains a constant velocity of 7 m/s headed away from point A. At some initial time, the cyclist is 259 m from point A. What will be his displacement from his starting position after 82 s?
7. ### physics

A cyclist maintains a constant velocity of 7 m/s headed away from point A. At some initial time, the cyclist is 259 m from point A. What will be his displacement from his starting position after 82 s?
8. ### physics

A cyclist maintains a constant velocity of 4.1 m/s headed away from point A. At some initial time, the cyclist is 244 m from point A. What will be his displacement from his starting position after 60 s?
9. ### physics

Two cyclists start out on the same trail together that is overall 20km long. The first cyclist completes the entire trail and is traveling at a constant 20 km/hr for the away part of the trip and then only 15 km/hr for the return trip. …
10. ### biomechanics

A cyclist is coasting up a hill. At t=0, the cyclist has a velocity of 14.27 m/s. If the acceleration of the cyclist is constant at -1.67 m/s2, how long will it take the cyclist to come to a complete stop?

More Similar Questions