A ball is projected upward at an angle of $45^{\circ}$ above the horizontal ground. After a brief flight, the ball lands back on the ground. Assume that air resistance can be neglected. What quantity is never zero during the ball’s flight?
- Athe horizontal component of the ball’s acceleration
- Bthe horizontal component of the ball’s velocity
- Cthe vertical component of the ball’s momentum
- Dthe vertical component of the ball’s velocity