Skydiving

The video explains how air resistance, a type of friction, affects a skydiver's descent. Initially, a skydiver falls due to gravity, with minimal air resistance due to a small surface area. As they fall, air resistance increases until it balances with gravity, reaching terminal velocity. When the parachute opens, the surface area increases, creating more air resistance, slowing the skydiver to a new, slower terminal velocity, allowing for a safe landing.

What force pulls a skydiver towards the Earth?

• Air resistance

• Magnetism

• Gravity

• Friction

What happens to a skydiver's speed when the forces of gravity and air resistance are balanced?

• The speed becomes zero

• The speed increases

• The speed decreases

• The speed becomes constant

What is the term for the constant speed a skydiver reaches when falling?

• Initial velocity

• Terminal velocity

• Maximum velocity

• Final velocity

How does opening a parachute affect a skydiver's fall?

• It decreases air resistance

• It increases air resistance

• It stops the fall completely

• It has no effect on air resistance

What is the new terminal velocity of a skydiver after the parachute opens?

• Zero velocity

• Equal to the initial velocity

• Slower than a walking pace

• Faster than a speeding car