Projectile Motion Test

A gun with a muzzle velocity of 100 m/s is fired horizontally from a tower. Neglecting air resistance, how far downrange will the bullet be 1 second later?

100m

An object is dropped and freely falls to the ground with an acceleration of 1g. If it is thrown upward at an angle instead, its acceleration will be?

1g downward

A projectile is launched vertically upward at 50 m/s. If air resistance is negligible, its speed upon returning to its starting point is

50 m/s

A stone is thrown horizontally from the top of a cliff. One second after it has left your hand its vertical distance below the cliff is

5m

A bullet fired horizontally from a rifle begins to fall

as soon as it leaves barrel

A rock is thrown at 50 degrees with respect to the horizontal. As it rises, its horizontal component of velocity

remains unchanged

What is not a vector quantity?

speed

A hunter on level ground fires a bullet at an angle of 10 degrees above the horizontal while simultaneously dropping another bullet from the level of the rifle. Which bullet will hit the ground first?

the dropped one

A bullet fired horizontally over the level ground hits the ground in 0.5 seconds. If it has been fired with twice the speed in the same direction it would have hit the ground in

0.5 seconds

A rock is thrown upward at 50 degrees with respect to the horizontal. As it rises, its vertical component of velocity

decreases

A projectile is fired horizontally in a region of no air resistance. The projectile maintains its horizontal component of velocity because it

is not acted on by any forces

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

remains constant

You throw an object upward at a 45 degree angle. With no gravity it will follow a straight-line path. But because of gravity, at the end of one second, it is

about 5m below the straight line

An airplane flies at 40 m/s at an altitude of 50 meters. The pilot drops a heavy package which falls to the ground. Where, approximately, does the package land relative to the plane's new position?

beneath the plane

What influences the horizontal and vertical velocities of a rock thrown off a cliff? How does each type change throughout the fall?

horizontal: no change, remains the same vertical: acted on by gravity

A hunter on level ground fires a bullet at an angle of 2 degrees below the horizontal while simultaneously dropping another bullet from the level of the rifle. Which bullet will hit the ground first?

the fired one

After a rock thrown straight up reaches the top of its path and then falls a short distance, its acceleration is

the same as it was at the top of its path