GCSE Physics - Terminal Velocity #55

The video explains terminal velocity, where an object's velocity becomes constant due to balanced forces. Initially, gravity causes acceleration, but as velocity increases, air resistance grows, reducing acceleration until it equals weight, achieving terminal velocity. Deploying a parachute increases air resistance, creating a new, lower terminal velocity. The video uses a velocity-time graph to illustrate these concepts.

What happens to a person when they first step out of an airplane?

• They start flying upwards.

• They remain stationary in the air.

• They begin to accelerate downwards due to gravity.

• They immediately reach terminal velocity.

Which factor does NOT affect the size of air resistance?

• Surface area of the object

• Velocity of the object

• Number of air particles

• Mass of the object

What happens to the resultant force as air resistance increases?

• It increases.

• It decreases.

• It remains constant.

• It becomes zero immediately.

At what point does an object reach terminal velocity?

• When air resistance equals weight

• When air resistance is greater than weight

• When weight is greater than air resistance

• When the object stops moving

What effect does opening a parachute have on a falling person?

• It decreases air resistance.

• It increases the person's weight.

• It increases air resistance, causing deceleration.

• It has no effect on the fall.

Why is the new terminal velocity with a parachute lower than without?

• Because the person slows down.

• Because the air resistance decreases.

• Because the weight increases.

• Because the person speeds up.

What is the resultant force when an object reaches terminal velocity?

• Equal to the sum of weight and air resistance

• Zero

• Equal to the air resistance

• Equal to the weight