A box is pulled vertically upward into the air by a rope at an accelerating rate DRAW THE APPROPRIATE FORCE OR FREEBODY DIAGRAM

What is the terminal speed of a 7.11 kg spherical ball that has a radius of 1.69 cm and a drag coefficient of 1.38? The density of the air through which the ball falls is 1.20 kg/m³. Number i Units

4 in- 4 in- 20 lb 40 lb B 2 in. 3 in. 3 in. E 1. The bracket is supported by pegs at C and D and a roller at E. Ignore friction and use 0 = 30°. %3D Draw the free body diagram for the bracket Solve for the reactions at C, D and E.

Question 2 2.0 m Pivot 70° Air A 0.550 kg wooden block is spun around on a wooden table. The wooden block is being spun around on a 2.00 m long massless wire. The wooden block has air being pushed out behind it causing a thrust force of 3.20 N. The air is being pushed out at 70.0" from the radial line as shown in the figure. If the block is initially at rest and the coefficient of friction is 0.300, what is the tension in the wire after 20.0 revolutions?

Part A A 23-kg chandelier hangs from a celling on a vertical 4.0-m-long wire. What horizontal force would be necessary to displace its position 0.15 m to one side? Express your answer to two significant figures and include the approprlate on b F = Value Units Submit Request Answer Part B What will be the tension in the wire? Express your answer to two significant figures and include the appropriate units. Fr Value Units Submit Request Answer

Question 6 kg 4 kg 25° A 4 kg block suspended in the air is held at rest by a massless string (and massless pulley) connecting it to a second 6 kg block on a 25° inclined ramp. There is static friction between the 6 kg block and the ramp. Find the static frictional force needed to keep the system at rest? Answer

Review A sailboat can be propelled into the wind by a maneuver called beating to windward. Beating requires the sailboat to travel in a zigzag pattern at an angle to the wind that is greater than the no-go zone, which is shaded red in (Figure 1). When a sailboat is just outside the no-go zone (boats B in the figure) the wind Part A exerts a force F on the sail that has a component in the direction of motion v. Similar comments apply to boats C. The work done by the wind on the sail is W = Fdcose, and because v = d/t, the propulsion power P = W/t delivered to the sailboat is Fvcose, where 0 is the angle between the sail force and the Assuming that F and v have the same magnitudes for each sailboat, will the propulsion power delivered to sailboats B be greater than, less than, or the same as the propulsion power delivered to sailboats C? direction of motion. O Less than Figure 1 of 1 O Greater than O Equal to Wind direction Submit Request Answer Part B If F = 900 N and v = 15 m/s, what…

Problem 4 The upper leg muscle (quadriceps) exerts a force of 1250 N, which is carried by a tendon over the kneecap (the patella) at the angles shown in the figure. Find the direction and magnitude of the force exerted by the kneecap on the femur. Fo = 1250 N 55° 75 Fo