Motion with air resistance

1. Exercise

The air resistance is F=0,5*c*ro*A*v². Since F is always opposite to the speed and v² has no sign, it is better to write v*abs(v) instead of v².

Compare the s-t-diagrams and v-t-diagrams of the falling motion with and without air resistance.

Data: c(full ball)=0.45; c(disk)=1.12; ro(air)=1.25kg/m³ ; A= according to your choice.

2. Exercise

A car (m=1.2 t) accelerates with the constant engine power of 100kW. Its cross-sectional area is 2m² and the drag coefficient is c=0.4. What is its maximum speed?

3. Exercise

Compare the throwing distance for steep (60°) and flat (30°) shots with and without air resistance. Which angle should you choose to get the maximum throwing distance?