Officers found a tennis ball with a fuse inserted into it in Grubbs' house in the 1100 block of Delray Drive. Inside the ball were 78 pellets and black explosive powder, according to court documents.

In case the air pressure inside the tennis balls simply wasn't sufficient, they even tried vacuum-sealing the car lock and applying 100 psi of air pressure ...

Here we get the answer. If the mass ratio is 3 to 1, the heavy mass stops. In that case all of the kinetic energy ends up with the lower-mass ball.

In one case a dog chewed and swallowed a ball , which appeared to result in a 'burn' around a mouth. Another dog, Otis in the FB post, was merely playing catch with a tennis ball. Mouth 'Burns ...