# Two particles and time dilation

Flor
Hi,

may I ask you about a help (or where to find proper study materials)?

I have two particles - A and B. A is moving at constant velocity in a gravitational field with constant acceleration (due to gravity). B is moving on spiral trajectory at accelerated velocity in a gravitational field with changing acceleration (due to gravity). What would be the time dilation for A and B?

Thank you very much!