Air resistance or upthrust :)
'Drag' which is air resistance.
Air resistance, also known as drag, is the force that slows down a parachutist as they fall through the air. The parachute helps increase the surface area, resulting in more drag force and slowing down the descent.
Air Resistance or friction with the air.
It is air resistance which slows the rate at which a parachutist falls, turning what would otherwise be a fatal fall into a controlled landing.
Air resistance, also known as drag, affects the way a parachutist falls by slowing down their descent. As the parachutist falls, the force of air resistance increases with speed, eventually reaching a point where it equals the force of gravity pulling the parachutist down. This creates a situation known as terminal velocity, where the parachutist falls at a constant speed without accelerating further.
The limiting frictional force is the force that slows down the tennis ball on the roller coaster.
When a parachute is deployed, the action force is the tension force exerted by the parachute on the air molecules it displaces downward. The reaction force is the equal and opposite drag force exerted by the displaced air molecules on the parachute fabric, which slows down the descent of the parachutist.
When a parachutist jumps, the parachute deploys and opens up, creating a large surface area. This increases air resistance, which slows down the fall by creating a drag force that counters gravity. The parachute allows the parachutist to safely land at a slower speed than if they were falling freely.
When the parachutist opens the parachute, the air resistance force will increase. This will reduce the net force acting on the parachutist, causing a decrease in acceleration over time. As the parachute slows the descent, the net force continues to decrease until the parachutist reaches a terminal velocity.
When a parachutist reaches terminal speed, the force of air resistance pushing up on the parachutist equals the force of gravity pulling the parachutist downward. At this point, the net force on the parachutist is zero, resulting in a constant velocity.
Friction
Air Resistance or friction with the air.