As you travel down the highway in your car, an ambulanceapproaches you from the rear at a high speed (Fig. OQ17.3) sounding its siren at a frequency of500 Hz. Which statement is correct? (a) You hear afrequency less than 500 Hz. (b) You hear a frequencyequal to 500 Hz. (c) You hear a frequency greater than 500 Hz. (d) You hear a frequency greater than500 Hz, whereas the ambulance driver hears a frequencylower than 500 Hz. (e) You hear a frequencyless than 500 Hz, whereas the ambulance driver hearsa frequency of 500 Hz.
Thursday, September 15, 2016 7 Ideas Chapter 9: Motion Motion:- 1- Uniform Velocity (Cruise control) 2- Relative Velocity 3-Acceleration -Uniform Velocity :- The change in an object’s distance divided by the change in time. (delta)d = V * (delta)t (delta)t = (delta)d / V V= (delta)d / (delta)t -Relative velocity :- Velocity of an object added to the velocity of a frame. -Simultaneous motion :- When an object moves 2 dimensions (directions) at the same time. -Frame :- ‘Box” in which the object moves. ____________________________________________________ Chapter 10: Acceleration -Acceleration :- The change in an object’s velocity divided by the change in time a= (delta)v / (delta)t Acceleration due to Gravity on Earth 1
