I would really appreciate some help on a few of my physics homework problems! Thanks so much 
1. An electron, starting from rest and moving with a constant acceleration, travels 4.7 cm in 8.5 ms. What is the magnitude of this acceleration?
Answer in units of km/s^2
2. A body moving with uniform acceleration has a velocity of 15.7 cm/s when its x coordinate
is 4.49 cm. If its x coordinate 1.26 s later is -3.82 cm, what is the x-component of its acceleration?
Answer in units of cm/s^2
3. A train is moving parallel and adjacent to a highway with a constant speed of 28 m/s. Initially a car is 36 m behind the train, traveling in the same direction as the train at 40 m/s and accelerating at 4 m/s^2. What is the speed of the car just as it passes the train? Answer in units of m/s
1. An electron, starting from rest and moving with a constant acceleration, travels 4.7 cm in 8.5 ms. What is the magnitude of this acceleration?
Answer in units of km/s^2
2. A body moving with uniform acceleration has a velocity of 15.7 cm/s when its x coordinate
is 4.49 cm. If its x coordinate 1.26 s later is -3.82 cm, what is the x-component of its acceleration?
Answer in units of cm/s^2
3. A train is moving parallel and adjacent to a highway with a constant speed of 28 m/s. Initially a car is 36 m behind the train, traveling in the same direction as the train at 40 m/s and accelerating at 4 m/s^2. What is the speed of the car just as it passes the train? Answer in units of m/s