Answer Happy

30.0 a) 45.28 b) 30.6s c) 18.6 s d) 5.20 s Matthew pulls his little sister Sarah in a sled on an icy surface (assume no friction), with a force of 60.0 N at an angle of 37.0 degrees upward from the horizontal. If he pulls her a distance of 12.0 m, what is the work done by Matthew? F = 60 N 5.370 d = 12 m 185 J b) 433 J c) 575 J d) 720 car goes around a flat curve of radius 50 m at a speed of 14 m/s. What must be the nimum coefficient of friction between the tires and the road for the car to make the turn? 0.80 b) 0.60 c) 0.40 d) 0.20 O-kg mass is positioned at (x = 2.0 m, y= 8.0 m) and a 2.0-kg mass is positioned at 5.0 m, y= 5.0 m). What are the coordinates of the center of mass of the system? = 3.0 m, y= 7.0 m = 4.0 m, y = 7.0 m c) x= 3.0 m, y=6.0 m d) x= 2.0 m, y= 6.0 m