Recent content by mizulyn

1). Is the acceleration of a projectile equal to zero when it reaches the top of its trajectory? I know that when a projectile reaches the top of its trajectory, v=0 because velocity is momentarily horizontal. However, how would I relate this to acceleration? 2). A tennis ball is hit...

Hello -- I'm an upcoming junior in high school, and I'm trying to study some physics by myself in preparation for the physics class I will be taking. However, I am confused on the following conceptual questions about kinematics: 1). Traffic lights are often timed so that if you travel at a...