A stone is thrown straight up at 5.94 m/s. What is the stone's acceleration in m/s/s at the top of its rise?

To find the stone's acceleration at the top of its rise, we need to understand the motion of a projectile.

When a stone is thrown straight up, it experiences a constant acceleration due to gravity. The acceleration due to gravity near the Earth's surface is approximately 9.8 m/s² and acts downward. The stone slows down as it moves upward, until it reaches its maximum height where its velocity becomes zero. At the top of its rise, the stone momentarily pauses before starting to fall back down.

So, the stone's acceleration at the top of its rise is equal to the acceleration due to gravity, which is approximately 9.8 m/s².