Graph
Terminal Velocity is a velocity where there is no acceleration - is constant.
This Graph show the ski diver's speed in a 4000 meter fall from hot - air balloon. After 30 seconds she jumped, the parachute opened.
The reason for terminal velocity after 10 seconds she jumped is due to the increase in air resistance, which got equal to the force of Gravity.
The air resistance increased due to the increase in the speed.
After the parachute was opened, the deceleration took place.
A parachute increases air resistance by significantly expanding the surface area of the falling object, causing more air molecules to be displaced and creating a larger drag force that opposes gravity.
Questions
What is the average speed of the sky diver in the first 4.0 seconds.
The average speed is distance travelled / time taken.
Distance travelled can be calculated from the graph, as the distance is the area below the speed time graph.
The Area below the speed time graph - which is constant acceleration - can be calculated with the equation to find a triangle's area which is "1/2 bh".
The area of a square or a rectangle is "bh" and a triangle is the half of a square or a rectangle when cut diagonally, therefore the equation of area of triangle can be calculated with "1/2 bh".
What is a Moment of Force
What is Buoyancy