physics

(a) If the maximum acceleration that is tolerable for passengers in a subway train is 1.52 m/s2 and subway stations are located 1030 m apart, what is the maximum speed a subway train can attain between stations?

b)what is the travel time between stations?

c)If a subway train stops for 20 s at each station, what is the maximum average speed of the train, from one start-up to the next?

1. 👍 0
2. 👎 1
3. 👁 589
1. Divide the problem in half, accelerate and deaccelerate.
half distance = 515
515 = (1/2)(1.52) t^2
that gives you half the time
v = 0 + 1.52 t^2
total time = 2 t + 20
v average = 1030/total time

1. 👍 0
2. 👎 1
2. thanks damon

1. 👍 0
2. 👎 1

Similar Questions

1. physics

Running into the train at that speed would severely damage both train and passengers. Calculate the minimum time Superman must take to stop the train, if the passengers experience an average horizontal force of 0.520 their own

2. Physics

A subway train starting from rest leaves a station with a constant acceleration. At the end of 5.59 s, it is moving at 11.5154 m/s. What is the train’s displacement in the first 4.15337 s of motion? Answer in units of m

3. Physics

The fast French train known as the TGV (Train à Grande Vitesse) has a scheduled average speed of 216 km/h. (a) If the train goes around a curve at that speed and the acceleration experienced by the passengers is to be limited to

4. math

The diagram below shows the speed time graph for a train travelling between two stations. The train starts from rest and accelerates uniformly for 150 seconds. It then travels at a constant speed for 300 seconds and finally

1. physics

the speed of a train is reduced uniformly from 10 m/s to 5 m/s while covering a distance of 150 m. What is the acceleration of the train? how much farther will it travel before coming to rest, assuming the same acceleration ?

2. Physics

Liz rushes down onto a subway platform to find her train already departing. She stops and watches the cars go by. Each car is 8.60 m long. The first moves past her in 1.75 s and the second in 1.17 s. Find the constant acceleration

3. Physics

A train on a mountain railway is carrying 200 people of average mass 70kg up a slope at an angle of 30° to the horizontal and at a speed of 6.0 m s–1. The train itself has a mass of 80 000 kg. The percentage of the power from

4. math

Fred arrives at the subway station every day at a random time and takes the first train that arrives. If he takes the A train, which arrives each hour on the hour, he ends up at the fitness center. If he takes the B train, which

1. Physics

A train is moving along a straight horizontal track. A pendulum suspended from the roof of one of the carriages of train is inclined at four degree to the vertical. Calculate tge acceleration of train

2. Science

a freight train must approach a road crossing at 16km/h. after passing through the intersection, the train speeds up to 65 km/h, taking 10 min to do so. what is the train's acceleration during this time in meters per second

3. PHYSICS

A bolt drops from the ceiling of a train car that is accelerating northward at a rate of 3.15 m/s2. What is the acceleration of the bolt relative to the train car? I don't understand how to do this problem at all... and why isn't

4. Physical Science

So, please check my answers here: 1. Which example identifies a change in motion that produces acceleration? A) A speed skater moving at a constant speed on a straight track** B) A ball moving at constant speed around a circular