Projectile motion review

Which of the following may be classified as projectile motion?

• a punted football

• a thrown baseball

• a water droplet cascading down a waterfall

• all of the above

In the absence of air resistance, the path of a projectile is a(n)

• parabola

• arc

• polygon

• semicircle

The motion of a projectile in free fall is characterized by

• ax = ay = -g

• ax = constant and vy = constant.

• vx = constant and ay = -g.

• vx = constant and vy = constant

For an object to be a projectile, it must be in free fall and its initial velocity must

• have a horizontal component.

• have both a vertical and a horizontal component.

• have either a vertical or a horizontal component.

• start from rest.

A ball is launched from a tennis ball cannon at a small angle. If the initial velocity is increased,

• the maximum height will increase

• the total displacement will remain the same

• the maximum height will remain the same, but total displacement will increase

• the maximum height and total displacement will remain the same

A volleyball player taps a volleyball well above the net. The ball’s speed is least

• just after it is tapped by the player.

• at the highest point of its path

• just before it strikes the ground.

• when the horizontal and vertical components of its velocity are equal.