An object starts from rest at the origin and moves along the x axis subject to the force shown in the figure below. If the mass of the object is 72.0 kg, determine the speed of the object at the following positions. Each unit along the position axis is 1.00 m and each unit along the force axis is 3.00 N. F (N) x (m) B C (a) x = A m/s (b) x =B m/s (c) * = C m/s Additional Materials Reading 5. [0/2 Points] DETAILS PREVIOUS ANSWERS OSUNIPHYS1 7.4.WA.031. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A truck accelerates uniformly from rest to 17.5 m/s in 5.90 s along a level stretch of road. Determine the average power required to accelerate the truck for the following values of the weight (ignore friction). (a) 9.00 x 10# N Can you write an expression for the average power in terms of the work done on the truck and the time over which this work occurs? How does the work done on the truck compare to its change in kinetic energy? Can you write an expression for the change in kinetic energy for the truck in terms of its final and initial speed? Don't forget, you have been given the weight of the truck, not the mass. W 1.25 X 104 N X How can you modify your work from part (a) in order to obtain the average power required for a truck with a different weight? w Additional Materials Reading