CH 4

remain directly under the airplane.

An object is dropped from an airplane flying at a constant speed in a straight line at a constant altitude. If there is no air resistance, the falling object will (as seen from the ground)

B. For time in the air, all that matters is the vertical motion. A goes higher, so takes more time (think: in y motion, they both start from rest at their peak; A has farther to go so is in the air longer)

Consider two objects A & B, launched at the same time, following the below paths: Which object hits the ground first?

is always zero.

For general projectile motion with no air resistance, the horizontal component of a projectile's acceleration

its velocity is perpendicular to the acceleration.

For general projectile motion, when the projectile is at the highest point of its trajectory

The horizontal component of a projectile's velocity remains a constant.

For general projectile motion, which of the following best describes the horizontal component of a projectile's velocity? Assume air resistance is negligible.

They both hit at the same time.

You drop a ball from rest and simultaneously shoot a second, identical ball horizontally from the same height as the first ball. If there is no air resistance, which ball hits the ground first?