A baseball is hit at an angle and rises toward the top of its arc. At the very top, what is its vertical velocity?
A ball arcs over a lawn. At the very top, its vertical velocity reaches zero for an instant. Does the acceleration pause there too?
Once the ball leaves the hand, gravity is the only force on it. Gravity does not pause at the top of the arc. It acts the same at every point of the flight.
At the peak, the velocity is purely horizontal, yet the acceleration still points straight down. Velocity and acceleration are different quantities. One can point sideways while the other points down.
The acceleration at the top cannot be zero. If it were zero for that instant, nothing would change the vertical velocity, and the ball would keep moving horizontally instead of coming down.
The acceleration never changes size and never changes direction: 9.8 m/s² downward, from release to landing.
A tennis ball arcs over a net. State its acceleration, size and direction, at a point on the way up, at the top, and at a point on the way down.
Gravity is the only force on the ball at all three points.
On the way up: 9.8 m/s² downward.
At the top: 9.8 m/s² downward.
On the way down: 9.8 m/s² downward.
9.8 m/s² downward at all three points.
A thrown ball is at the very top of its arc. What is its acceleration at that instant?
A ball rises after an angled throw and later falls. Which statement compares its acceleration on the way up with its acceleration on the way down?
A basketball arcs toward a hoop. Edie says that at the very top of its arc, the ball's acceleration is zero for an instant. Is she correct?
A stone is tossed at an angle over a stream. At a moment 0.4 s before it lands, what is its acceleration?
A football's arc is marked at four points: just after the kick, halfway up, at the very top, and halfway down. At which marked point, if any, is the football's acceleration smallest?
A ball rolls off a high ledge and follows a curving path to the ground. Which statement describes its acceleration during the flight?