Physics of Free Fall and Air Resistance

The video explains the concept of free fall using a bowling ball and feather, highlighting how objects fall at the same rate in a vacuum due to gravity. It discusses the forces involved, including gravitational force and air resistance, and how these affect the motion of objects. The video also explores the concept of weightlessness, explaining how it occurs when only gravity acts on an object, such as in free fall. Additionally, it covers projectile motion, showing how objects in free fall can have both vertical and horizontal components of motion.

What happens when a bowling ball and a feather are dropped in a vacuum?

• The bowling ball falls faster.

• The feather falls faster.

• They fall at the same rate.

• Neither falls.

Why do objects fall at the same rate in a vacuum?

• Because they have the same mass.

• Because air resistance is present.

• Because gravitational force is the only force acting.

• Because of different gravitational forces.

What factor does air resistance depend on?

• Mass and speed

• Surface area and speed

• Volume and mass

• Density and volume

Why does a feather fall slower than a bowling ball in air?

• Because it has less gravitational force.

• Because it has more mass.

• Because it has more air resistance.

• Because it has less air resistance.

What is the relationship between weight and gravitational force?

• Weight is always greater than gravitational force.

• Weight is the force you exert on a scale.

• Weight is always equal to gravitational force.

• Weight is independent of gravitational force.

What happens to your weight in an accelerating elevator?

• It becomes zero.

• It decreases when accelerating upwards.

• It increases when accelerating upwards.

• It remains the same.

What is a projectile?

• An object in free fall with no other forces acting.

• An object only moving horizontally.

• An object with increasing mass.

• An object with constant speed.

How does a projectile move?

• In a zigzag pattern.

• In a parabolic path.

• In a circular path.

• In a straight line.

What happens to a projectile's horizontal velocity?

• It remains constant.

• It becomes zero.

• It decreases.

• It increases.

What is the effect of throwing a projectile faster?

• It stops in mid-air.

• It moves in a circle.

• It falls straight down.

• It goes higher and farther.