Projectile Motion Quiz

The horizontal component of a projectile's velocity is independent of

• the range of the projectile.

• time.

• the vertical component of its velocity.

At the instant a ball is thrown horizontally with a large force, an identical ball is dropped from the same height. Which ball hits the ground first?

• Neither. They both hit the ground at the same time.

• The dropped ball

• The horizontally thrown ball

In the absence of air resistance, the angle at which a thrown ball will go the farthest is

• 15 degrees.

• 30 degrees.

• 45 degrees.

• 60 degrees.

• 75 degrees.

A projectile is fired horizontally in a vacuum in Earth.. The projectile maintains its horizontal component of speed because it

• has no vertical component of speed to begin with.

• is not acted on by any forces.

• the net force acting on it is zero.

• is not acted on by any horizontal forces.

• none of the above

A cannonball is launched horizontally from a tower. If the cannon has a barrel velocity of 60 m/s, where will the cannonball be 1 second later? (Neglect air resistance.)

• 3 m downrange

• 30 m downrange

• 6 m downrange

• 60 m downrange

• 90 m downrange

A ball is rolled off a 250m high cliff with a constant horizontal velocity of 40 m/s. What is the horizontal displacement?

• 285.6 m

• 5.60 m

• 70.04 m

• 7.14 m

• none of the above

Which of the following is the motion of objects moving in two dimensions under the influence of gravity?

• horizontal velocity

• parabola

• directrix

• projectile motion

What is the path of a projectile?

• a wavy line

• a parabola

• a hyperbola

• Projectiles do not follow a predictable path.

What is the horizontal acceleration of a projectile?

• 9.81 m/s2

• 0 m/s2

• -9.81 m/s2

• 10 m/s2

A 2 kg cannonball is launched at a speed of 10 m/s at an angle of 35 degrees. If the mass of the cannonball is changed to 8kg, how will the range of the projectile be affected?

• the range will increase

• the range will stay the same

• the range will decrease

• not enough information