Recent content by archcos

  1. A

    Projectile Motion: A boy throw a ball above a barn roof

    i get errors here 11=12^2sin^2theta / 2*9.8 11*2*9.8=144sin^2theta √215.6/144=√sin^2theta theta=arcsin(1.22) then error
  2. A

    Projectile Motion: A boy throw a ball above a barn roof

    syntax error for me...i can't get the angle
  3. A

    Projectile Motion: A boy throw a ball above a barn roof

    Homework Statement A boy attempts to throw a ball over the roof of a barn 11m high with an initial velocity of vsub0=12m/s. Determine the angle theta, at which the ball must be thrown so that it reaches its maximum height, which is at the roof of the barn. also find x where the boy must stand...
  4. A

    Coefficient of kinetic friction and constant velocity

    How to find the degree of inclination if there is only coefficient of kinetic of friction is given & a constant velocity? the coefficient of kinetic friction between a wooden box and an inclined plane is 0.30. At what angle will the box slide with a constant velocity once set in motion?