A typical laboratory centrifuge rotates at 4000 rpm. Test tubes have to be placed into a centrifuge very carefully because of the very large accelerations. a. What is the acceleration at the end of a test tube that is 10 cm from the axis of rotation? b. For comparison, what is the magnitude of the acceleration a test tube would experience if dropped from a height of 1.0 m and stopped in a 1.0-ms-long encounter with a hard floor?
Lectures 8 nd Dynamics KINEMATICS describes “how” things move, DYNAMICS describes “why” things move Unbalanced Force causes motion to c hange (Δv ) Force → a physical uantity escribing how hard and in what direction acceleration is moving (push or pull) Requires an agent a nd object Is a vector Contact Force Physically touches o bject The agent is exactly what is in contact with the object Long Range Force Not touching (gravity is the only one
