Answer Happy

v (m/s) 40 = 13. The magnitude of the velocity vector v of a car traveling east is plotted as a function of time in the diagram on the right. How would you describe the acceleration vector ā of the car at t= 4 s? (a) ā is zero (b) ā is constant and points east (c)ā is constant and points west (d) ā is not constant and point east 20 0 0 t(s) 4 8 12 14. In the previous problem, how would you describe the acceleration vector ā of the car at t= = 10 s? (a) ā is zero (b)ā is constant and points east (c)ā is constant and points west (d)ā is not constant and point east = 15. In the previous problems, if the mass of the car is m= 2,000 kg, then what is the magnitude of the net force being exerted on the car at t = 4 s? (a) 80,000 N (b) 6,700 N (c) 5,000 N (d) 2,000 N