The graph below plots velocity vs. time for a particle moving along a straight path. v (m/s) 16 12 8 4 12 t (s) 24 6 18 -4 -8 -12 -16 (a) What is the average acceleration of the particle during the following time intervals? (Enter your answers in m/s2. Indicate the direction with the signs of your answers.) (i) O s to 6.00 s m/s? (ii) 6.00 s to 18.0 s What is the definition of average acceleration? What are the initial and final times? Read the initial and final velocities from the graph. m/s² (iii) O s to 24.0 s 2 What is the definition of average acceleration? What are the initial and final times? Read the initial and final velocities from the graph. m/s?

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Relative Velocity

It is a measurement of an object with regards to the other object which is moving or stable or stationary. For example, if we are traveling in a bus and the bus is moving at speed of 50km/hr, then our speed is according to the nearby passenger on the bus is zero. According to them, we are not moving. But if one person standing on the ground or road observes us from outside of the bus, according to him we are moving at a speed of 50km/hr and the bus is also moving at a speed of 50km/hr. Now, the motion is recognized by the observer, it depends on a frame of reference or observer. This is motion called relative motion.