Block 1 (19 kg) is located on the surface of a table. A rope pulls on block 1 with a tension of 207.4 N at an angle of 42.46 degrees above the horizontal. The coefficient of kinetic friction between the block and the surface equals 0.4 (Use g = 10 m/s2). On a sheet of paper, draw the free body diagram for block 1 using the two-subscript notation from class. After completing the free body diagram, enter below each force and its x & y-components. Remember that the x-component is the "i" component and the y-component is the "j" component. FORCES on BLOCK 1 Weight force on block 1 by Earth W1E = i + j N Tension force on block 1 by Rope (rounded to nearest integer) T1R = i+ j N Document Converters Normal force on block 1 by Surface N1S = li+ j N Frictional force on block 1 by Surface fis = it j N Submit Answer Tries 0/2 What is the acceleration a of block 1? a = + j m/s2A 3.1 kg block located on a horizontal floor is pulled by a cord that exerts a force F = 10.5 N at an angle theta = 37 degrees above the horizontal, as shown. The floor ha a coefcient of kinetic friction pk = 0.1. DRAW the FREE BODY DIAGRAM for the block to solve this problem! um gum...\" Hint: First calculate the net force, and then the acceleration. What is the magnitude of the acceleration [m/sz] of the block? mes o/2 What is the horizontal speed [m/s] of the block 4.8 seconds after it starts moving? mes o/z A box (300 kg) is on the floor at rest. A rope exerts a horizontal tension force of 80 N to the right on the stationary box. The coefficient of static friction = 0.6 between the box and the floor. Assume g = 10 m/s2. What is the static friction force on the box by the floor? 1500 N. O 1800 N. O 80 N. cument Converters O 48 N. O 3000 N.Us = 1/2 kx2 Spring 1 Spring 2 Pk ALF distance Sliding A block of mass 5 kg compresses spring 1 with a force constant, k1=5000 N/m, by 8 cm. It is released and slides for a total of 50 cm on a surface with uk=0.2, at which point it compresses another sprir k1=1000 N/m and momentarily comes to rest. Remember that US is the potential energy of the spring. Find the following values: What is the Initial spring potential energy of spring 1. awmmunr J Submit Answer Tries 0/2 How much energy is dissipated by heat? This is the amount of work done by friction x -1. J Submit Answer Tries 0/2 How much Potential Energy does spring 2 have when the block has compressed spring 2 and is momentarily stopped? J Submit Answer Tries 0/2 By how much does spring 2 compress? cm Submit Answer Tries 0/2 LCosG To push a crate of mass 95 kg up a frictionless ramp with an angle of 30 to the horizontal, a worker exerts a force of 1000 N parallel to the incline. The crate moves a distance of 7.5 m What work is done on the crate by the worker? :] J Submit Answer Tries 0/2 What work is done by the weight of the crate? J Submit Answer Tries 0/2 What work is done by the normal force exerted by the oor on the crate?? J Submit Answer Tries 0/2 What is the total work done on the crate? [:1J Submit Answer Tries 0/2 A block of mass 3 kg is sitting on a frictionless surface. The block initially has a velocity of 3 m/s. A force of 9 N is applied for 4 5. What is the Initial momentum of the block? 9.00 kg m/s The initial momentum is the mass times the initial velocity. This is 3 kg x 3 m/s = 9 kg m/s. Computer's answer now shown above. You are correct. Your receipt no. is 154-4028 W What is the Initial Kinetic Energy of the block? 13.5.1 The initial Kinetic energy p2] (2 m). This is (9 kg m/s)2 / (2 x 3 kg) = 13.5 J . Computer's answer now shown above. You are correct. Your receipt no. is 154-1273 W What is the change in momentum of the block? 36.0 Kg m/s The change in the momentum is equal to the Impulse, Force x time, or 9 kg x 4 s = 36 kg m/s. Computer's answer now shown above. You are correct. Your receipt no. is 154-3501 W What is the final momentum of the block? k9 m/S You already know both the initial momentum and the change in the momentum. Submit Answer Incorrect. Tries 1/2 Previous Tries What is the final velocity of the block? S m Submit Answer Tries 0/2 What is the final Kinetic Energy of the block? 3 J Submit Answer Tries 0/2 A lighter block (2 kg) and a heavier block (8 kg) sit on a frictionless surface. Both blocks are initially at rest. The same force of 4 N then pushes to the right on each block for a distance of 16 m. What are the initial kinetic energies of the blocks? 11 Submit Answer Tries 0/2 What are the changes in kinetic energy of the blocks? AK\" = J AKZi = J Tries 0/2 What are the final kinetic energies of the blocks? K" = J Kzf = J Submit Answer Tries 0/2 What are the initial momenta of the blocks? :21: = kg m/s P21 = k9 m/S Tries 0/2 What are the final momenta of the blocks? Pu = ' kg "1/5 P2: = 1 kg m/5 Submit Answer Tries 0/2 What are the changes in momenta of the blocks? AP: = :1 kg m/s APz =l lkg m/s Submit Answer Tries 0/2 How long does it take each block to travel the distance of 16 m? M1 = 5 At: = _ 5 Submit Answerl Tries 0/2 A lighter block (0.5 kg) and a heavier block (1 kg) sit on a frictionless surface. Both blocks are initially at rest. The same force of 2 N then pushes to the right on each block for a time of 5 s. What are the initial momenta of the blocks? P1i = kg m/s P2i = kg m/s Submit Answer Tries 0/2 What are the changes in momenta of the blocks? AP1 = kg m/s AP2 = kg m/s Submit Answer Tries 0/2 What are the final momenta of the blocks? Pif = kg m/s P2f = kg m/s Submit Answer Tries 0/2 What are the initial kinetic energies of the blocks? K1i = K21 = Submit Answer Tries 0/2 What are the final kinetic energies of the blocks? Kif = K2f = Submit Answer Tries 0/2 What are the changes in kinetic energy of the blocks? AK1i = AK21 = Submit Answer Tries 0/2 How far does each block travel during the time of 5 s? AX1 = m AX2 = m Submit Answer Tries 0/2A 1500 kg car travels at 30 m/s and then quickly stops in 4 s to avoid an obstacle. What is the Initial Momentum of the car? :i kg mxs Submit Answer Tries 0/ 2 What is the Initial Kinetic Energy of the car? :13 Submit Answer Tries 0/ 2 What is the magnitude of the impulse needed to stop the car? :i Kg m was on What is the magnitude of the average force in kiloNewtons (kN) that stopped the car? Notice the units! :1 kN Submit Answer Tries 0/ 2 What is the magnitude of the accleration that stopped the car? :1 m/s2 Submit Answer Tries 0/2