# Physics

Randi ran two laps around a 400m track.She completed the first lap in 50seconds and then decreased her speed by 5% for the second lap.
Find:
A)her speed on the first lap
B)her speed on the second lap
C)her total time for the two laps
D)her average speed for the two laps

1. 👍
2. 👎
3. 👁
1. A. distance = 400 m; time = 50 seconds
distance = rate x time. Solve for rate.

B. distance = 400 m
time for second lap is 50s-0.05(50s) = ?
solve for rate.

C. total time = time for first lap + time for second lap = ?

D. average speed (rate) = total distance/total time.

1. 👍
2. 👎
👤
DrBob222
2. Why don't you give the answer??????? ๐ ๐ ๐ ๐

1. 👍
2. 👎

## Similar Questions

1. ### science

a runner training for a race times her 400 meter laps around a track. her times are lap 1 60 seconds, lap 2 57 seconds, lap 3 55 seconds and lap 4 53 seconds. what is her avaerage velocity in meters per second (m/s)?

2. ### Math

Javia ran 8 laps around a track to run a total of 1 mile on Monday. How many laps will she need to run on Tuesday to run 3/8 of a mile?

3. ### math

For his exercise today, Josh plans to both run and swim. Let r be the number of laps he runs and let s be the number of laps he swims. Each lap he runs takes him 4 minutes, and each lap he swims takes him 3 minutes. He wants to

4. ### math

Courtney is supposed to run laps around the outdoor track. At the start of each lap, however (even the first), there is always an 8 percent chance that Courtney will call it quits for the day. What is the probability that today

1. ### Physical science

A runner at a track meet completes exactly one lap around a 400 m track Whatโs the distance and The displacement

2. ### Geometry

A speed skating track has a perimeter of 400m. Determine the straightaway length of the track. * the width of the track is 50m* Please help . Thank you for your time

3. ### Math

Three friends drove radio controlled cars around a track. The table below shows the number of laps completed by each person and the time it took. Latoya Mary Melissa Number of laps 9 30 20 Time (minutes) 3 6 5 Write the number of

4. ### math!!!!

One lap around the track is equal to 1/8 of a mile. A horse ran a distance of 9 laps in 2 minutes and 30 seconds. What was the horse's average speed in miles per minute?

1. ### math 2

a typical lap around a track in the united states has a length of 440 yards. how many laps would need to be completed to run a mile?

2. ### math

Tayson walked for 8 minutes before running n laps around a track. Tayson takes 1 minute and 45 seconds to run each lap. What is the graph of the function that relates the amount of time, T, in minutes Tayson walked or ran after

3. ### Math

Jill and Matt run on a 400-meter-long oval track. They each run 10 laps daily and both run in the same lane. One day, they begin at the same point, but ran in opposite directions. Jill ran at a constant speed that was 2 meters per

4. ### Math

one track coach wants his athletes to race 8 miles around a track to measure how fast each person can run if the track is 2/3 of a mile around. How many laps around the track will the athletes have to run to complete the race?