Projectile Motion Ck-12

To hit the bull's eye of a target, you have to aim an arrow...

• above the bull's eye.

• below the bull's eye.

• to one side of the bull's eye.

• at the center of the bull's eye.

An object such as an arrow that follows a curved path down to the ground has (a)   motion.

(a)   is the force that causes an object to have a curved path during projectile motion.

Before an arrow is shot from a bow, forces acting on the arrow include the

• elastic force of the bow

• force of gravity

• static force of friction

• all of the above

The only force acting on an arrow projectile after it is launched is ...

• push force

• launch force

• gravity force

• electric force

Examples of objects that have projectile motion include

• moons of planets.

• artificial satellites.

• paintballs.

• all of the above

An object with projectile motion constantly changes direction.

• true

• false

A projectile is an object moving in the air under the effect of gravity alone.

• true

• false

Knowledge of projectile motion might help you aim a basketball when you throw it so it is more likely to go into the basket.

• true

• false

A cannonball shot from a cannon has projectile motion.

• true

• false