Questions: A ball is tossed straight up in the air. At its very highest point, the ball's instantaneous acceleration (ay) is zero. upward. downward

Solution Steps

• When a ball is tossed straight up, it moves against the force of gravity.
• Gravity is a constant force acting downward on the ball throughout its motion.

• At the highest point, the ball's velocity is zero because it changes direction from upward to downward.
• However, the acceleration due to gravity (\( g \)) is still acting on the ball.

• The acceleration of the ball at any point in its trajectory, including the highest point, is downward.
• This is because gravity is the only force acting on the ball, and it always acts downward.

Final Answer