The keyhole effect involves a small spatial region where a planet's gravity can alter the trajectory of a passing asteroid, allowing it to return on a collision course with that planet in the future.

Sankhyā: The Indian Journal of Statistics, Series B (1960-2002), Vol. 32, No. 3/4 (Dec., 1970), pp. 363-378 (16 pages) For computing the trajectory of a projectile the retardation coefficient is ...

The terms projectile and trajectory are introduced. Projectile Motion: The terms projectile and trajectory are introduced. Students learn to describe horizontal and vertical components of a projectile ...

In a previous post, I was trying to show that the range of a projectile depends on the launch angle. Yes, this isn't that too difficult to see in an introductory physics course, but how do you show ...