Stars in a more massive galaxy will orbit faster than those in a lower mass galaxy because the greater gravity force of the massive galaxy will cause larger accelerations of its stars. (astronomynotes.com)
Pushing your body against gravity forces your body to burn all the extra calories making you fit. (anytimestrength.com)
The large velocities of the galaxies in the clusters are produced by more gravity force than can be explained with the gravity of the visible (either shining or blocking light) matter in the galaxies. (astronomynotes.com)