physics

A football is kicked at an angle 𝜃 with respect to the horizontal. Which one of the following statements best describes the acceleration of the football during this event if air resistance is neglected?

The acceleration is 9.8 m/s2 downward at all times.

An object is moving forward and speeding up. Which statement about this object MUST be true?

The net force on the object is in the forward direction.

If an object is moving with a constant forward velocity what statement is true?

The net force on the object is zero.

A constant net force acts on an object. Describe the motion of the object.

constant acceleration

For general projectile motion, when the projectile is at the highest point of its trajectory

the vertical component of its velocity is zero.