please. help mw with his physics 20 (grade11) quiz

I HAVE A TIME LIMIT

Question 3 Which of the following statements is true under all circumstances? Not yet answered Select one: Marked out of 1.00 O a. If an object is moving, an unbalanced force acts on it. Flag O b. If an object is at rest, no forces act on it. question O c. If an object is moving, it has a natural tendency to keep moving. O d. If an object is moving, it has a natural tendency to stop moving.Question 4 Three blocks, X, Y, and Z, with the weights shown, are resting on a horizontal table. What is the net force acting on Not yet block Y? answered Marked out of X 4.0 N 1.00 Y 5.0 N Flag Z 10 N question Select one: O a. 5.0 N [down] O b. 9.0 N [up] O c. 4.0 N [down] O d. zeroQuestion 5 A light rope is used to lift a 10 kg mass and give it an acceleration of 2.0 m/s2 [up] (g = 9.81 m/s2 [down]). What is Not yet the net force on the mass? answered Marked out of Select one: 1.00 O a. 1.2 x 102 N [up] Flag question O b. 10 N [up] O c. 1.0 x 102 N [up] O d. 20 N [up]Question 6 A 12 kg truck tire, Y, is lying on a horizontal, frictionless surface. The tire is attached to two light ropes that pass Not yet over light, frictionless pulleys to hanging pails, X and Z. If pail X has a mass of 5.0 kg and pail Z has a mass of 3.0 answered kg, what is the magnitude of the acceleration of the tire? (g = 9.81 m/s2 [down]) Marked out of 1.00 tire Y Flag question pall x pall Z Select one: O a. 0.40 m/s2 O b. 2.5 m/s2 O c. 1.6 m/s2 O d. 0.98 m/s2