"Momentum," Mr. Harrison said, circling the word. "Mass times velocity. If the object is heavy, and it is moving fast... it is very hard to stop."
Alex rested his chin on his hand. He knew about momentum.
Arsenal had momentum. They had beaten Chelsea. They had saved the team. For now.
But momentum... it works both ways. If you stop moving, you crash.
The bell rang.
"Mr. Finch," the teacher called out. "Don't forget. Your project on 'Forces' is due Friday."
"I am working on it, sir," Alex said. "I am studying... collisions."
"Excellent. Practical experiments?"
"You could say that," Alex smiled.
He walked out of the school. It was raining again.
Mark was waiting. He was not in the green car. He was in a giant, black SUV. It looked like a tank.
"New car?" Alex asked, climbing in.
"Milo rented it," Mark said. He was wearing a helmet. A bicycle helmet.
"Mark... why?"
