how does a parachute work.
a. the parachute's downward force resist gravity's downward force
b. the parachute's upward force resist gravity's downward force
c. the parachute's upward force resist gravity's upward force
d. the parachute's downward force resist gravity's upward force
a. the parachute's downward force resist gravity's downward force
The correct answer is b. The parachute's upward force resists gravity's downward force.
A parachute works based on the principles of air resistance and Newton's laws of motion. When a person or object jumps out of an aircraft, they initially have a downward force acting on them due to gravity. As they fall, they open the parachute, which greatly increases their surface area and consequently increases the air resistance acting upon them.
The parachute's fabric creates drag, which creates an upward force that opposes the downward force of gravity. As a result, the person or object slows down and eventually reaches a terminal velocity, which is the maximum speed at which they can fall. The parachute continues to provide an upward force that helps slow down the descent and allows for a safe landing.
So, the parachute's upward force resists gravity's downward force, allowing for a controlled descent and a safe landing.
A parachute works by using air resistance or drag to slow down the descent of an object in the atmosphere. This allows the object (usually a person or cargo) to land safely by reducing the speed of their fall.
When a parachute is deployed, it opens up and creates a large surface area that is perpendicular to the direction of the object's motion. As the object falls, the parachute interacts with the air molecules around it, causing a significant amount of drag. This drag force opposes the object's downward motion and slows it down.
The correct answer is a. The parachute's downward force resists gravity's downward force. In other words, the force exerted by the parachute on the air creates resistance, which counteracts the force of gravity pulling the object down. This resistance helps to slow down the descent and allows for a softer landing.