Please carefully take your time to do these PCS211 questions about Newton's Laws!

8. [l4 Points] SERPSE10 5.4.0P.006.MI. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER ) Two forces F1 and F2 act on a 8.00-kg object. F1 : 400 N and F2 : 160 N. F} F} mm 60.0\" m E m is, D L1 Q (:1) Find the acceleration of the object for the configuration of forces shown in Figure (a). magnitude\\:| m/s2 _. direction \\:I (counterclockwise from F1) ([3) Find the acceleration of the abject for the configuration of forces shown in Figure (b). magnitude\\:| m/s2 _. direction \\:| D (counterclockwise from F1) Need Help? 10. [-/5 Points] DETAILS SERPSE10 5.4.P.007. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Three forces acting on an object are given by F1 = (-1.91 + 5.50j) N, F2 = (4.951 - 1.5j) N, and F3 = (-501) N. The object experiences an acceleration of magnitude 3.50 m/s. (a) What is the direction of the acceleration? . (counterclockwise from the +x-axis) (b) What is the mass of the object? kg (c) If the object is initially at rest, what is its speed after 15.0 s? m/s (d) What are the velocity components of the object after 15.0 s? (Let the velocity be denoted by v.) V = i + j m/s Need Help? Read It Watch It11. [-/4 Points] DETAILS SERPSE10 5.7.OP.014. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER The systems shown below are in equilibrium with m = 6.20 kg and 0 = 28.0. If the spring scales are calibrated in newtons, what do they read? Ignore the masses of the pulleys and strings and assume the pulleys and the incline are frictionless. m m m a b m m m C d scale in (a): N scale in (b): N scale in (c): N scale in (d): N Need Help? Read It Watch It13. [-/3 Points] DETAILS SERPSE10 5.7.OP.017. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A bag of cement weighing 350 N hangs in equilibrium from three wires as suggested in the figure below. Two of the wires make angles 0, = 62.0 and 0, = 38.0 with the horizontal. Assuming the system is in equilibrium, find the tensions 71, 72, and 73 in the wires. T1 N T2 ZZ T 3 T T2 CEMENT i Need Help? Read It Watch It14. [-/2 Points] DETAILS SERPSE10 5.7.P.020. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER An object of mass m = 1.00 kg is observed to have an acceleration of a with a magnitude of 17.6 m/s in a direction 0 = 51.0 east of north. The figure below shows a view of the object from above. The force F 2 acting on the object has a magnitude of 11.1 N and is directed north. Determine the magnitude and direction of the force F, acting on the object. magnitude N direction --Select--- v F2 Need Help? Read It15. [-/3 Points] DETAILS SERPSE10 5.7.P.022. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER An object of mass m, = 3.90 kg placed on a frictionless, horizontal table is connected to a string that passes over a pulley and then is fastened to a hanging object of mass m, = 8.70 kg as shown in the figure. m mo (a) Draw free-body diagrams of both objects. Chon tep Khong co tep nao duoc chon This answer has not been graded yet. (b) Find the magnitude of the acceleration of the objects. m / s (c) Find the tension in the string. IN Need Help? Read It Watch It16. [-/4 Points] DETAILS SERPSE10 5.A.OP.042. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A block and sphere are connected by a cord that passes over a pulley as shown. Neglect friction and assume the cord is massless. Take m, = 2.00 kg, m2 = 7.45 kg, and 0 = 50.0. m mg (a) What are the magnitude of acceleration (in m/s2) of the block and sphere? | m / s2 (b) What is the tension (in N) in the cord? (Enter the magnitude.) N (c) What is the speed (in m/s) of each object 2.50 s after being released from rest? m/s (d) What If? If the incline under my is rough, what is the minimum value of the coefficient of static friction us for which the system will not move? Hs =22. [-/4 Points] DETAILS SERPSE10 5.A.OP.044. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Two blocks of different metals are sitting on a steel platform as shown. The blocks are connected by a cord running over a frictionless pulley. The aluminum block has mass m, = 4.75 kg and the copper block has mass m, = 7.10 kg, and 0 = 38.50. (See this table for the appropriate coefficients of friction). Aluminum Copper Steel (a) The blocks are released from rest. Will they move? O Yes O No (b) If the blocks move, what is the magnitude of the acceleration (in m/s2) of the two-block system? (If the blocks do not move, enter 0.) |m / s 2 (c) If the blocks move, what is the magnitude of the tension force (in N) in the cord? (If the blocks do not move, enter 0.) N (d) If the blocks do not move, what is the sum of the magnitudes of the forces of friction (in N) acting on the blocks? (If the blocks move, enter 0.) IN Need Help? Read It