13. [0/6 Points] PREVIOUS ANSWERS SERPSE10 7.4.P.014. 1/6 Submissions Used ASK YOUR TEACHER A light spring with force constant 3.45 N/m is compressed by 7.40 cm as it is held between a 0.350-kg block on the left and a 0.700-kg block on the right, both resting on a horizontal surface. The spring exerts a force on each block, tending to push the blocks apart. The blocks are simultaneously released from rest. Find the acceleration with which each block starts to move, given that the coefcient of kinetic friction between each block and the surface is 0, 0.048, and 0.410. (Let the coordinate system be positive to the right and negative to the left. Indicate the direction with the sign of your answer. Assume that the coemcient of static friction is the same as the coefficient of kinetic friction. If the block does not move, enter 0.) (a) H = U heavier block 7164 X Your response is off by a multiple of ten. m/s2 7.29 X lighter block 2 The response you submitted has the wrong sign. m/s (b) y = 0.048 3.17 heavier block 7 X 2 Your response differs signicantly from the correct answer. Rework your solution from the beginning and check each step carefully. m/s -s.az x lighter block Your response differs signicantly from the correct answer. Rework your solution from the beginning and check each step carefully. m/s2 (c) p : 0.410 -D.37 heavier block 7 X 2 Consider carefully whether the correct answer is exactly zero, orjust a very small number. m/s 3.25 x lighter block Your response differs signicantly from the correct answer. Rework your solution from the beginning and check each step carefully. m/s2 Need Help? 14. [2/3 Points] PREVIOUS ANSWERS SERPSE10 7.4.P.019. 1/6 Submissions Used ASK YOUR TEACHER (a) A force F = (3xi + Syi), where F is in newtons and x and y are in meters, acts on an object as the object moves in the x-direction from the origin to X = 5.39 In. Find the work W = f? - d; done by the force on the object (in J). _x What is the direction of 11?? What happens to the y component of? when you evaluate E . 11;? J (b) What In Find the work W = fF. . d; done by the force on the object (in J) if it moves from the origin to (5.39 m, 5.39 m) along a straighteline path making an angle of 45DD with the positive X-axis. 116.2 J J Is the work done by this force dependent on the path taken between the initial and nal points? 0 dependent (9 independent V Need Help? 15. \"/2 Points] DETAILS PREVIOUS ANSWERS SERPSE10 7.5.0P.016. 1/6 Submissions Used A stone with a mass of 3.20 kg is moving with velocity (5.00? 2.40j) m/s. (HINT: v2 = 3 - 3.) (a) What is the stone's kinetic energy (in J) at this velocity? -w (b) Find the net work (in J) on the stone if its velocity changes to (8.00? + 4.003) m/s. _x This is the kinetic energy for the new velocity. You are looking for the net work clone on the stone, which is the change in kinetic energy J Need Help