I eeffing ate physics

A football is kicked into the air at an angle of 45 degrees with the horizontal. At the very top of the ball's path, its velocity is

entirely horizontal

A football is kicked into the air at an angle of 45 degrees with the horizontal. At the very top of the ball's path, its acceleration is _______. (Neglect the effects of air resistance.)

entirely vertical

A projectile is launched at an angle of 15 degrees above the horizontal and lands down range. For the same speed, what other projection angle would produce the same downrange distance?

75 degrees

At what point in its path is the horizontal component of the velocity (vx) of a projectile the smallest?

It is the same throughout the path

Which statements are true about the time of flight for a projectile?

-For a project that is launched horizontally, the time that a projectile is in the air is dependent on the initial height above the ground. -For a project that is launched at some angle above the horizontal, the time in the air is dependent upon this vertical component of the initial velocity. -For a projectile which lands at the same height that it is projected from, the time to rise to the peak is equal to the time to fall from its peak to the original height.

A bullet is fired horizontally and hits the ground in 0.5 seconds. If it had been fired with twice the speed in the same direction, it would have hit the ground in ____. (Assume no air resistance.)

0.05s

At what point in its path is the vertical component of the velocity (vy) of a projectile the smallest?

At the top

Roll a bowling ball off the edge of a table. As it falls, its horizontal component of velocity ___.

remains constant

An object is undergoing free fall motion. As it falls, the object's

speed increases