Question

investigate falling objects and relate their motion to gravity and air resistance

Answer 1

an object thrown vertically upwards has always downward acc g
in upward motion it has air resistance down which inc its acc
and during down acc is upwards hence time require in acent is less than decent

Answer 2

often take the force of gravity for granted, even though Earth's gravity is what keeps each of us from floating off into space! In this lesson, students begin to more fully understand and appreciate the force of gravity. They predict what will happen when a whole apple and half an apple are dropped at the same time from the same height then test their predictions. Next, they observe cannonballs of different masses being dropped out of a tower, and leaking cups being dropped into a bucket. These activities demonstrate that all objects fall at the same rate, regardless of their mass - a concept known as the law of falling bodies. Students then watch a video segment showing a NASA astronaut dropping a feather and a hammer on the Moon. They repeat the activity in the