An airplane has to go from pointA to another pointB, 500 km away due 30degree east of north. A wind is blowing due north at a speed of 20meter per second. The air speed of plane is 150meter per second. a) Find the direction in which the pilot should heat the plane to reach point B.
b) Find the time taken by the plane to go from A to B.

You are your friend move a new refrigerator into his kitchen. you apply a horizontal force of 252 n in the negative x direction to try and move the 56 kg refrigerator. the coefficient of static friction is 0.61. (a) how much static frictional force does the floor exert on the refrigerator? give both magnitude (in n) and direction. magnitude n direction (b) what maximum force (in n) do you need to apply before the refrigerator starts to move?