Problem 1: A farmer is using a rope and pulley to lift a bucket of water from the bottom of a well that is h, = 9.5 m deep. The farmer uses a force F = 51 N to pull the bucket of water directly upwards. The total mass of the bucket of water is m, + my = 3.7 kg. Part (a) Select the correct free body diagram. mg m„gf F mg'm,g m„g mg F m„gTm,g F m,g F, m„gY m,g m,g Submit Hint Feedback I give up! Hints: 2 for a 0% deduction. Hints remaining: 0 Feedback: 0% deduction per feedback. -Draw your own free body diagram and compare it to the ones listed. |-What forces are acting up, what forces are acting vertically down? Part (b) Calculate how much work Wrin J the farmer does on the bucket of water (via the rope) to raise it to ground level. W;= 484.5 / Correct! Part (c) Calculate how much work W, in J gravity does on the bucket filled with water as the farmer lifts it up the well. W =- 206.1 W, = -206.1 X Attempts Remain Part (d) Calculate the net work Wnet in J done on the bucket of water by…

Three boxes are lined up so that they are touching each other on a nearly frictionless plane. Box A has a mass of ?A=21.5 kg,mA=21.5 kg, box B has a mass of ?B=28.0 kg,mB=28.0 kg, and box C has a mass of ?C=47.5 kg.mC=47.5 kg. An external force ?⃗ F→ pushes on box A toward the right, and the force that box B exerts on box C has a magnitude of 203 N.203 N. Ignore friction. What is the magnitude of the acceleration ?a of the boxes?

as a fish jump vertically out of the water, assume that only two significant forces act on it: an upward force F exerted by the tail fin and the downward force due to gravity. a force chinook salmon has a length of 1.50 m and a mass of 48.5 kg. if the fish is moving upward at 3.00 m/s as its head first breaks the surface and has an upward speed of 5.80 m/s after two-thirds of its length has left the surface, assume constant acceleration and determine the following. a. the salmon's  acceleration b. the magnitude of the force F during this interval

B9

You’re exploring a cave. Standing in a low cavern, you steady yourself by pushing straight up on the rock ceiling. Identify the forces acting on you.

Ex.3: determine the magnitude of forces FA and FB acting on each chain In order to develop a resultant force of 600 N directed along the positive Y-axis. Sol.: y FA 30 600 F- 439 N Aas a 45 sia 105 600 F 311 N Ams 105 -60ON

Forces A, B and Care applied at the origin in the directions indicated in the figure below. A has a magnitude of 22 N and is 40 above the positive X-axis. B has a magnitude of 25 N and is 60* above the negative X-axis. The forces are in equilibrium. 0 15 N B -10 60 20 15 8 10 int D 4 8 3 8 3 45- 20 25 30- C 435 N The magnitude of the components of A are most nearly (enter as positive): |A₂| N and A The magnitude of the components of B are most nearly (enter as positive): B₂ N and B The magnitude of force Čapplied at the origin required to balance the system is most nearly: N to th The angle of force from the negative X-axis as indicated is most nearly: 409 TO BE fast 75

Three boxes are lined up so that they are touching each other on a nearly frictionless plane. Box A has a mass of ?A=19.0 kg, box B has a mass of ?B=30.5 kg, and box C has a mass of ?C=53.0 kg. An external force ?⃗ pushes on box A toward the right, and the force that box B exerts on box C has a magnitude of 194 N. Ignore friction. What is the magnitude of the acceleration ? of the boxes?

Four forces act on an object and are given by A = 37.3 N east, B = 38.3 N to the north, C = 62.7 N to the west, Y D = 64.7 N to the south. (Consider that east goes in the direction of the + x axis and that north goes in the direction of the + y axis.) a) What is the magnitude of the net force (in N) on the object? b) What is the direction of the force? (Enter your answer in degrees counterclockwise from the + x axis)