Posted by **Norman** on Saturday, October 1, 2011 at 10:57am.

Stickman is driving a dragster. He does the quarter mile in 4 seconds and at the finish line is speed is 100m/s. He deploys his parachute after he crosses the finish line and wished to slow to a speed of 10m/s in 10s. What diameter parachute does he need if the drag force is equal to -Av^2 (A is the shoot area=pir^2 in m^2)

The resistive force acting on the dragster is f=-Av^2

you know the following

m=1000kg

v= speed of the dragster at any time after stickman crosses the finish line

vi=100m/s=speed of the dragster as stickman crosses the finish line

g=acceleration due to gravity

1)write newton's second law equation for the dragster any time after stickman crosses the finish line.

2) solve newton's second law equation to determine an expression for the area of the parachute attacked to the dragster at any time after stickman crossest eh finish line.

3)determine the diameter of the parachute needed to slow the dragster down from 100m/s to 10m/s in 10s.

## Answer This Question

## Related Questions

- physics - Stickman is driving a dragster. He does the quarter mile in 4 seconds ...
- Physics - A dragster travels 1/4 mile in 6.1 seconds. Assuming the acceleration...
- Physics - during a race,a dragster is 200 meters from the finish line when ...
- algebra 2 - 15 seconds after the buzzer, the teacher still has 135 meters to go ...
- Physics - A bicycle racer sprints near the end of a race to clinch a victory. ...
- Physics - The average speed of a car was 60m/s by the time it reached the finish...
- physics - A runner is at the starting gate and hears the starting gun. He begins...
- physics - A runner is at the starting gate and hears the starting gun. He begins...
- 10 - A runner is at the starting gate and hears the starting gun. He begins ...
- geometry - the teacher: 15 seconds after the buzzer, the teacher has 135 meters ...

More Related Questions