PHY 220 Lecture Notes - Lecture 9: Free Body, Net Force, Normal Force
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Always points in the direction of the gravitational acceleration (towards the earth) Force unit = newton (n) = kgm/s 2. Draw a fbd for every force problem. Draw and label all force vectors that affect the object. Be careful with directions, but not magnitudes (don"t worry about scale) An object"s velocity vector remains constant if and only if the net force acting on the object is zero. In an interaction between two objects, each object exerts a force on the other. These two forces are equal in magnitude and opposite in direction. F _(a on b)=- f _(b on a) The normal force is what prevents one object from moving through another. Denoted by the letter n , sometimes f_n. Can change magnitude to prevent acceleration in the. Force along a string, rope, chain, or other connecting. Tension is uniform in magnitude along the rope. Tension is in the direction of the string/rope.
