Atrain travels in a straight line at 15.0 m/s for 2 km, then at 30.0 m/s for another 2 km. part a part complete is the average speed of the train greater than, less than, or equal to 25 m/s? is the average speed of the train greater than, less than, or equal to 25 ? the average speed of the train is less than 25 m/s. the average speed of the train is greater than 25 m/s. the average speed of the train is equal to 25 m/s. previous answers correct part b verify your answer to part a by calculating the average speed. express your answer to three significant figures and include the appropriate units.

The average speed is 20 m/s

Explanation:

To calculate this we need to divide the distance in meters (2km + 2km = 2000m + 2000m = 4000 m ) times the speed (in seconds) the train was traveling

using x = t * v we can calculate the time for each part

2000m = t₁ * 15 m/s

2000m / 15 m/s  = 133.33333333... s = t₁

2000m = t₂ * 30m/s

2000m / 30 m/s = 66.6666666... s = t₂

then

t2 equal the displacement of the particle over the same time period if t2> t/2? hint: consider a sine wave starting at t1=0, then consider a closing wave starting at t1=0, for your explanatio

firearm identification is the process of analyzing the bullets and cartridge cases left at a crime scene to determine if they came from a particular firearm. marks on the bullets and cartridges may be common to every firearm of that type. these are called class characteristics.