Projectile Motion

A ball thrown straight up takes 8 total seconds to complete its journey all the way up and down. 1 second into its journey and 7 seconds into its journey the magnitude of its velocity will be ______________ and its direction _______________.

• opposite, the same

• the same, opposite

• the same, the same

• opposite, opposite

The initial horizontal velocity of a projectile is ____ its final horizontal velocity.

• less than

• equal to

• greater than

What is true about the vertical velocity of a projectile launched horizontally?

• It is initially at its maximum value.

• It increases due to gravity as it falls.

• It remains constant throughout its trajectory.

• It decreases as it falls due to gravity.

Which hits the ground first if they start at the same height: a dropped ball or a ball launched with a

horizontal velocity?

• the launched ball

• the dropped ball

• they both hit at the same time

An airplane traveling at constant velocity drops a bomb. Where is the airplane when the bomb hits the

ground?

• above the bomb

• before the bomb

• past the bomb

The path followed by a projectile is also known as its

• trajectory

• range

• height

• vertical displacement

Once a projectile is launched, what is the only force that affects its motion?

• mass

• friction

• inertia

• gravity

Which of the following would NOT be considered a projectile?

• A cannonball fired towards a distant castle.

• A cannonball rolling down a slope.

• A cannonball fired straight outward from a castle wall.

• A cannonball after it rolls off the edge of a cliff.

An object is shot from the ground (at 25 m/s) at 25 degrees and 65 degrees.  Which one has the greater range?   (assume no air resistance)

• 25 degrees
• 65 degrees
• same for both

An object is shot from the ground (at 25 m/s) at 25 degrees and 65 degrees.  Which one rises to a higher height? (assume no air resistance)

• 25 degrees
• 65 degrees
• same for both