# A model train with a mass of #7 kg# is moving along a track at #15 (cm)/s#. If the curvature of the track changes from a radius of #24 cm# to #45 cm#, by how much must the centripetal force applied by the tracks change?

##### 1 Answer

Jul 17, 2017

#### Answer:

0.31N

#### Explanation:

First calculate the Centripetal Force for one of the situations, in this case I will calculate the force required for the 24cm track first.

At this stage you should convert your quantities to standards units, eg meters and meters per second.

So

Then use the formula:

And substitute the given values:

Now find the difference between the two forces: