FREE-FALL

What is the acceleration of an object in free-fall near Earth's surface,ignoring air resistance?

• 0 m/s²

• 4.9 m/s²

• 9.8 m/s²

• 19.6 m/s²

Who proved that all falling objects fall with uniform acceleration?

• Aristotle

• Galileo Galilei

• Isaac Newton

• Plato

What causes the object in vacuum fall at the same time?

• due to air in space

• due to air resistance

• due to mass of object

• due to no air resistance

According to Aristotle, which falls faster, heavier or lighter object?

• fall at the same time

• heavier

• lighter

• no data at all

What is the focus of Aristotle and Galileo’s ideas?

• history

• motion

• knowledge

• views