Newton's second law and a locomotive

[Jennifer001]

Homework Statement

A 50,000 kg locomotive is traveling at 60.0 when its engine and brakes both fail.

How far will the locomotive roll before it comes to a stop?

I'm completely lost and i don't know how to get started on this question

 

[LowlyPion]

Homework Statement

A 50,000 kg locomotive is traveling at 60.0 when its engine and brakes both fail.

How far will the locomotive roll before it comes to a stop?

I'm completely lost and i don't know how to get started on this question

F = m*a

If there is no braking, there is no force. No force means no deceleration.

Is that the entire statement of the problem?

 

[Jennifer001]

yes that's the entire question

 

[Jennifer001]

for F=m*a there is no acceleration because its alrdy traveling at 60m/s sorry i left that "m/s" out of the question

 

[LowlyPion]

for F=m*a there is no acceleration because its alrdy traveling at 60m/s sorry i left that "m/s" out of the question

Better hope there is a lot of track then.

 

[Sakha]

If the problem doesn't state a friction force involved, or any other type of force involved, then the train will keep moving until...some force interact with it.

 

[tiny-tim]

If the problem doesn't state a friction force involved, or any other type of force involved, then the train will keep moving until...some force interact with it.

Yup!

btw, this isn't a Newton's second law problem, but a Newtons first law problem …

a body on which no forces act continues to move with uniform velocity.