1-a train travels 100 km to reach town a in one hour and 15 min. the train stops at station a for 45 minutes. then it travels 150 km to station b in 2 hours. what is the average velocity of the train?
average velocity= displacement/time

2-a car accelerates uniformly at the rate of 1.2 meters per second squared for a distance of 75 meters. if the truck started with a initial velocity of 6 meters per second, what is its velocity at the end of the 75 meters?
vf^2=vi^2 + 2as

Answer 1) : 62.5 km/hour is the average velocity of the train.

2) The final velocity of the car at the end of 75 m is 14.69 m/s

Explanation:

1) Displacement of the train = 100 km + 150 km = 250 km

Total time train took =1 hour 15 min+ 45 min + 2 hours = 240 min = 4 hours

Average velocity=

62.5 km/hour is the average velocity of the train.

2) The acceleration of the car, a= 1.2

Distance covered by the car,s = 75 m

Initial velocity of the car , = 6 m/s

Final velocity of thre car ,=?

Using third equation of motion:

The final velocity of the car at the end of 75 m is 14.69 m/s

i think it’s a. this is because if they measured the mass of something with a mass of 150g, then their final answer would have to be approximately 150g. though all of their answers are almost 150, rosa and tran have the closest answers (or the exact answer) to the accurate one.

answer: question1

1,000 tons

question2

3: 8

question 3

store d

step-by-step explanation: