One drop of oil falls straight down onto the road from the engine of a moving car every 5 s. Figure OQ2.1 shows the pattern of the drops left behind on the pavement. What is the average speed of the car over this section of its motion?

(a) 20 m/s

(b) 24 m/s

(c) 30 m/s

(d) 100 m/s

(e) 120 m/s

The displacement (in meters) of a particle moving in a straight line is given by s = t2 - 8t + 16, where t is measured in seconds, Find the average velocity over each time interval. [3,4] m/s [3.5, 4] m/s [4, 5] m/s [4, 4.5] m/s Find the instantaneous velocity when t = 4. m/s

A rock falls from a tower that is 73.5 m high . As it is falling . its height is given by the formula h = 73.5 -4.9t2 , with t in seconds . how many seconds will it take for the rock to hit the ground (h=0)? 1102.5 sec 8.6sec 3.9 sec 8.3 sec The position of an object moving in a straight line is given by s=2t2 -3t, where s is in meters and t is the time in second the object has been in motion .how long (to the nearest length ) will it take the object to move 15 meters? 16.0 sec 3.4 sec 3.6 sec 40.5 sec