Hello I need help with questions 4 (part A and B), question 5 (part b), question 9 (part A), and question 10 (A and B) as I got those one wrong, as seen in the image those were wrong answers. Thank you!

9. [112 Points] PREVIOUS ANSWERS SERPSE10 8.3.0P.007. 2/6 Submissions Used A box is given a push across a horizontal surface. The box has a mass m, the push gives it an initial speed of vi, and the coefcient of kinetic friction between the box and the surface is \"k' ASK YOURTEACHER (a) Use energy considerations to nd an expression for the distance the box moves before it stops. (Use any variable or symbol stated above along with the following as necessary: g.) 2 d = vi 2m: From conservation of energy we have AE system = Z T. The change in energy of the system is the change in kinetic energy of the box, and the only energy transfer is the work done by friction. Remember to express the work done by friction as a scalar product. (b) What If? If the initial speed of the oox is increased by a factor of 4, determine an expression for the new distance dnew the box slides in terms of the old distance d. 16 yd Need Help? _ 10. [-/2 Points] SERPSE10 8.3.0P.008. 0/6 Submissions Used ASK YOURTEACHER A block of mass m = 2.00 kg is attached to a spring of force constant k = 440 N/m as shown in the figure below. The block is pulled to a position xi = 4.55 cm to the right of equilibrium and released from rest. (a) Find the speed the block has as it passes through equilibrium if the horizontal surface is frictionless. iii We (in) Find the speed the block has as it passes through equilibrium (for the first time) if the coefcient of friction between block and surface 15 \"K = 0.350. i m/s Need Help? 5. [1/2 Points] PREVIOUS ANSWERS SERPSE10 8.2.0P.005. 2/6 Submissions Used MY NOTES ASK YOUR TEACHER As shown in the gure, two containers of mass and are connected by an essentially massless, non-elastic cord passing over a light, frictionless pulley. The container of mass m1 is released from rest at height h above the table. Use the isolated system model to answer the following. (We assume m1 > m2. Use any variable or symbol stated above along with the following as necessary: 9.) (3) Determine the speed of m2 just as rn1 hits the table. 2gh(m1 m2) v _ m1 + m2 ~/ (b) Find the maximum height above the table to which m2 rises. Need Help? mun Vlewirig Saved Work Revert to Last Response Submit Answer 6. [2/2 Points] DETAILS PREVIOUS ANSWERS SERPSE10 8.2.0P.004.MI. 2/6 Submissions Used MY NOTES ASK YOUR TEACHER 4. [2/4 Points] PREVIOUS ANSWERS SERPSE1O 8.2.0P.003.M|. 1/6 Submissions Used ASK YOUR TEACHER A head with a hole through it slides on a wire track. The wire is threaded through the hole in the bead, and the bead slides without friction around a loop-the-Ioop (see gure below). The bead is released from rest at a height h = 3.30R. O l A I: O L R >i , G) (a) What is its speed at point A? (Use the following as necessary: the acceleration due to gravity 9, and R.) v = \\/ 4.60gR X (b) How large is the normal force on the bead at point A if its mass is 4.90 grams? magnitude l0,173 ix N direction l downward v \\/ (c) What If? What is the minimum height h from which the bead can be released if it is to make it around the loop? (Use any variable or symbol stated above as necessary') h= 2R J Need Help7