12-54. The v-t graph for the motion of a car as it moves along a straight road is shown. Draw the s-t and a-t graphs. Also determine the average speed and the distance traveled for the 15-s time interval. When t= 0, s =0. v (m/s) 15 v = 0.612 -1 (s) 15

the ball is kicked at an angle of 30° A) if it strikes the ground at B having coordinates (15, -9), determine the speed at which it is kicked, in ft/s B.) if the ball is kicked at a speed of 80 ft/s, determine the point 'y' , in feet, where it strikes the ground. Assume the ground has shape of parabola as shown. C) if the ball is kicked at a speed of 80 ft/s, determine the point 'x' , in feet, where it strikes the ground. Assume the ground has shape of parabola as shown.

A car travels up a hill with the speed shown. Determine the total e (m/s) distance the car travels until it stops (t=60s). Plot the a-t graph. See figure on the right. 10- r(s) 60

Situation 3: The speed of the train during the first minute has been recorded as follows: t(s) 0 40 60 80 v (m/s) 0 20 25 34 Plot the v-t graph, approximating the curve as straight-line segments between the given points. Determine the total distance traveled.