The curved section of a speedway is a circular arc having a ...

[schs14]

The curved section of a speedway is a circular arc having a radius of 190 m. This curve is properly banked for racecars moving at 34 m/s. At what angle with the horizontal is the curved part of the speedway banked?
 
  A) 34 B) 30 C) 28 D) 32 E) 26

Question 2

You are standing in a moving bus, facing forward, when you suddenly slide forward as the bus comes to an immediate stop. What force caused you to slide forward from the point of view of the observer on the ground?
 
  A) the force that Earth exerts on you
   B) the force exerted by the floor of the bus on you perpendicular to the floor
   C) the force exerted by the floor of the bus parallel to the floor (the friction force)
   D) There is not a force causing you to your fall.

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[schs14]

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