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Excellent! The bottle is stationary, so, its acceleration is \(\vec{a} = 0\). Using \(\vec{a} = 0\) in \(\vec{F} = m \vec{a}\), we get \(\vec{F} = 0\).
Let's go back to the monkey jumping around and kicking the ball. If the monkey spilt some water and made the surface perfectly smooth so that there is no friction, which is true?
  • Net force on ball is zero; Ball slows down
  • Net force on ball is zero; Ball doesn't slow down
  • Net force on ball is not zero; Ball doesn't slow down
  • Net force on ball is not zero; Ball slows down