The displacement (in feet) of a particle moving in a straight line is given by s=21​t2−7t+16, where t is measured in sec

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The Displacement In Feet Of A Particle Moving In A Straight Line Is Given By S 21 T2 7t 16 Where T Is Measured In Sec 1 (94.1 KiB) Viewed 37 times

The displacement (in feet) of a particle moving in a straight line is given by s=21​t2−7t+16, where t is measured in seconds. (a) Find the average velocity (in ft/s ) over each time interval. (i) [4,8] ft/s (ii) [6,8] ft/s (iii) [8,10] ft/s (iv) [8,12] ft/s (b) Find the instantaneous velocity (in ft/s ) when t=8. ft/s