Topic The s Hec MyEa Hec Log Ir Hoc Chapt A CI X www. Logol Logo Grade o Mail - M Chapt pi www. Answam Recer Cours myLo D2L Grade + X C webassign.net/web/Student/Assignment-Responses/last?dep=29775147#Q6 LE * OK Update 9. [-/1 Points] DETAILS SERCP11 5.6.P.034. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A 23.0 cm long spring is hung vertically from a ceiling and stretches to 31.5 cm when an 8.00 kg mass is hung from its free end. HINT (a) Find the spring constant (in N/m). N/m (b) Find the length of the spring (in cm) if the 8.00 kg weight is replaced with a 175 N weight. cm Need Help? Read It Watch It 10. [-/1 Points] DETAILS SERCP11 5.6.P.038. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Two blocks are connected by a light string that passes over a frictionless pulley as in the figure below. The system is released from rest while my is on the floor and m, is a distance h above the floor. m1 Search 12:32 PM 12/4/2022 6Topic: The s Hec MyEa Hec Log Ir He Chapt A CI X www. Logol Logo Grade o Mail - Chap & www. Answrecer *Cours myLo D2L Grade + X C webassign.net/web/Student/Assignment-Responses/last?dep=29775147#Q6 *O K Update 10. [-/1 Points] DETAILS SERCP11 5.6.P.038. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Two blocks are connected by a light string that passes over a frictionless pulley as in the figure below. The system is released from rest while my is on the floor and m, is a distance h above the floor. m1 h m 2 (a) Assuming m, > m2, find an expression for the speed of m, just as it reaches the floor. (Use any variable or symbol stated above along with the following as necessary: g.) V F = (b) Taking m, = 7.0 kg, m2 = 4.1 kg, and h = 3.1 m, evaluate your answer to part (a). m/s (c) Find the speed of each block when m, has fallen a distance of 1.4 m. m/s Need Help? Read It 11. [-/1 Points] DETAILS SERCP11 5.6.P.043. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER The system shown in the figure below is used to lift an object of mass m = 65.0 kg. A constant downward force of magnitude F is applied to the loose end of the rope such that the hanging object moves upward Search 12:33 PM 12/4/2022 6Topic: The s Hec MyEa Hec Log Ir Hoc Chapt A CI X www. Logol Logo Grade o Mail - Chapt www. Answrecer *Cours myLo D2L Grade + O X C webassign.net/web/Student/Assignment-Responses/last?dep=29775147#Q6 LE * OK (Update Need Help? Read It 11. [-/1 Points] DETAILS SERCP11 5.6.P.043. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER The system shown in the figure below is used to lift an object of mass m = 65.0 kg. A constant downward force of magnitude F is applied to the loose end of the rope such that the hanging object moves upward at constant speed. Neglecting the masses of the rope and pulleys, find the following. T 12 m (a) Find the required value of F. IN (b) Find the tensions 71, 72, and 73. (73 indicates the tension in the rope which attaches the pulley to the ceiling.) T1 = N T2 z z T3 (c) Find the work done by the applied force in raising the object a distance of 2.60 m. kJ Need Help? Read It Watch It 12. [-/1 Points] DETAILS SERCP11 5.7.P.051. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Search W 12:33 PM 12/4/2022 6Topic: The s Hec MyEa Mcc Log Ir He Chapt A CI X www. Logol Logo My Grade o Mail - Chapt www. Answrecer *Cours myLo D2L Grade + X C webassign.net/web/Student/Assignment-Responses/last?dep=29775147#Q6 * OK (Update (c) Find the work done by the applied force in raising the object a distance of 2.60 m. kJ Need Help? Read It Watch It 12. [-/1 Points] DETAILS SERCP11 5.7.P.051. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER What average mechanical power (in W) must a 75.0 kg mountain climber generate to climb to the summit of a hill of height 405 m in 50.0 min? Note: Due to inefficiencies in converting chemical energy to mechanical energy, the amount calculated here is only a fraction of the power that must be produced by the climber's body. HINT | w Need Help? Read It Watch It 13. [-/1 Points] DETAILS SERCP11 5.7.P.055. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Under normal conditions the human heart converts about 12.8 J of chemical energy per second into 1.28 W of mechanical power as it pumps blood throughout the body. HINT (a) Determine the number of Calories required to power the heart for one day, given that 1 Calorie equals 4186 J. Cal (b) Metabolizing 1 kg of fat can release about 9000 Calories of energy. What mass of metabolized fat (in kg) would power the heart for one day? kg Need Help? Read It Watch It 12:33 PM Search 12/4/2022 6Topic: The s Hec MyEa Hec Log Ir He Chapt A CI X www. Logol Logo Grade Mail - Chapt www. Answrecer *Cours myLo D2L Grade + X C webassign.net/web/Student/Assignment-Responses/last?dep=29775147#Q6 LE * OK (Update 14. [-/1 Points] DETAILS SERCP11 5.8.P.059.MI. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER The force acting on a particle varies as in the figure below. (The x axis is marked in increments of 1.50 m.) F. (N) ON G E x (m) Find the work done by the force as the particle moves across the following distances. (a) from x = 0 m to x = 12.0 m (b) from x = 12.0 m to x = 18.0 m (c) from x = 0 m to x = 18.0 m J Need Help? Read It Master It 15. [1/1 Points] DETAILS PREVIOUS ANSWERS SERCP11 5.A.P.074. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A student evaluates a weight loss program by calculating the number of times he would need to climb a 14.0 m high flight of steps in order to lose one pound (0.45 kg) of fat. Metabolizing 1.00 kg of fat can release 3.77 x 10/J of chemical energy and the body can convert about 18.6% of this into mechanical energy (the rest goes into internal energy.) HINT 12:33 PM Search 12/4/2022 6