When the body under consideration is gaining momentum and energy the same physical mechanism is called slingshot effect, or gravity assist.

We fall around the Core, use the slingshot effect.

Orbits generally have a slingshot effect; sending the ball into an orbit generally means it returns immediately from another.

Once the Praetor gives the order, our operatives will be sent into Earth's past using a slingshot effect.

"There will be this slingshot effect: whoever does well in New Hampshire is just going to be propelled out of the state."

The slingshot effect is fine when we're dealing with a century or two, but how will it be with multimillions of years?

We know a slingshot effect takes us back in time roughly a hundred years to the minute.

Sending squadrons of warbirds back through time using the slingshot effect had been a promising gambit.

The ship will loop around the star, using its gravity for a slingshot effect.

When he shoots, there is a slingshot effect: The puck will go somewhere, but where?