Question

A car is dropped with parachute on another planet. Mass of car is 200kg, and diameter of chute is d and drag force F.

velocity it decends is 50m/s and acceleration gravity of planet is 3 m/s^2 and atmospheric density 0.01kg/m^3.

A model is designed to test on earth using 1/12 scale model, earth gravity 9.81, atmospheric dens. 1.2kg/m^3.

dimensionless: gd/decent velocity , m/density*d^3, f/(density*desc velcity*d^2)

for real tests on earth that would accurately be same, find

1. mass of car

2. decent velocity of car

3. ratio of drag force

Answer 1

plz comment if you have any doubts