25/A- Airbus 320 fly in steady level flight with altitude 10.5 km and the density at this level p=0.3877 kg/m³, mass of aircraft 6500 kg, wing area 124 m², CD = 0.015+ 0.02 CL², maximum thrust at sea level 53.015 kN. Calculate maximum velocity.

(a) A iron block with a mass of 6.9 kg initially slides over a rough horizontal surface with a speed of 9.0 m/s. Friction slows the block to rest. While slowing to rest, 85.0% of the kinetic energy of the block is absorbed by the block itself as internal energy. What is the temperature increase of the block? (Enter your answer in degrees Celsius.)  ?°C (b) What happens to the remaining energy?  It is absorbed by the horizontal surface on which the block slides.  It vanishes from the universe.      It becomes chemical energy.  It is so minute that it doesn't factor into the equation.

A car with mass 1600 kg and negligible aerodynamics is braking on an asphalt with global longitudinal friction coefficient 0.75. What is the maximum possible deceleration?

The Antonov An-225 is the heaviest aircraft ever built, with a maximum takeoff weight of 640 metric tonnes. It also has the largest wingspan of any aircraft in operational service. Sea level standard day (sls) conditions for calculations are 15°C; 101.3kPa Rotate speed (Vr) at takeoff (sls): Vr = 154 kts = 1.2×Vmin (1 kt = 0.514 m/s) Cruise Engine Thrust : a) Calculate the lift coefficient for a standard day takeoff b) Calculate the drag coefficient at cruis Fcruise = 0.85 Fmax Engine maximum thrust: Factual,max = Fsls,max×δ θ½   δ = Pactual/Pref; and   θ = Tref/Tactual