(b) A 750 N man starts climbing a ladder that is placed against a wall as shown in Figure 3b. Assume that coefficient of static friction, μ, = 0.25 and coefficient of kinetic friction, μk = 0.18 at both surfaces. Neglecting the weight of the ladder: a. Calculate how far up the ladder (length x) can the man climb before the ladder starts slipping, and b. Can a much lighter man climb up higher? Please explain. € 8 m 30°

Hi, I really appreciate you taking the time to help me out! John places a coin on a horizontal turntable with a rubber surface. The coin is 28 cm from the center of the circular table. He notices that the coin just begins to slip when the table rotates at 45 rpm (revolutions per minute). What is the coefficient of static friction between the coin and turntable?

1 V:IV H.W.docx H.W: Two boxes are connected by a cord running over a pulley. The coefficient of kinetic friction between m, (5kg) and the table is 0.20. We ignore the mass of the cord and pulley and any friction in the pulley, which means we can assume that a force applied to one end of the cord will have the same magnitude at the other end. We wish to find the acceleration, a, of the system, which will have the same magnitude for both boxes assuming the cord doesn't stretch, As m (2Kg) move down, m,move to the right. m. د قوة الشد Tو تسارع النظام .a علما بأن البكرة مهملة الكتلة والاحتكاك؟ 出 1

1 V:IV H.W.docx H.W: Two boxes are connected by a cord running over a pulley. The coefficient of kinetic friction between m, (5kg) and the table is 0.20. We ignore the mass of the cord and pulley and any friction in the pulley, which means we can assume that a force applied to one end of the cord will have the same magnitude at the other end. We wish to find the acceleration, a, of the system, which will have the same magnitude for both boxes assuming the cord doesn't stretch. As m; (2Kg) move down, m, move to the right. m. د قوة الشد Tو تسارع النظام .a علما بأن البكرة مهملة الكتلة والاحتكاك؟ 出 l20 Son la 1

The coefficient of friction between the 50 Ib weight and the 300 Ib weight is 0.5. The 300 Ib weight is free to roll, and the weight and friction for the pulley are negligible. When P=16lb, what is the acceleration of block B? B

A 70 kg box is resting on a reclining floor. The coefficient of fricion between the floor and the box is: static = 0.30, kinetic = 0.10. If the floor is to be inclined at an angle of 25 deg a. what would be the acceleration of the object along the direction of the inclined floor? b. what would be the vertical displacement of the box after 1.5 seconds? Express your answer in unit of meters. c. what is the total distance travelled by the box after 1.5 seconds? Express your answer in unit of meters.

Consider two geometrically identical marbles stacked in a container as shown. The radius of each of the marbles is R. while the width of the container is 2.9R. The marble at the top has a weight 0.78 N while the weight of the lower marble has a weight of 0.82 N. What is the magnitude of the normal force at point B? Express your answer in Newtons and with two decimal places. C А В

I need help with this practice problem. The answer key doesn't provide the free body diagram but it says b.) 0.9m from the other end, but I don't understand how to solve it.  Two people (a child and parent) are sitting on a teeter-totter of length L = 3 m andmass m = 10 kg. There is a single support in the middle. The adult weighs m1 = 75 kg and thechild weighs m2 = 30 kg. (a) Draw a free body diagram. (b) If the child sits on the end of the teeter-totter, where must the adult sit to balance it?

A ladder of negligible mass composed of two ?-long rails that are hinged at the top, is placed on top of a frictionless floor. A metal bar, connecting both rails halfway up the ladder is placed so that the two rails make an angle of ?= 44.0◦ at the apex. Lastly, a ? = 4.40[kg] block is placed 2/3 of the way up the ladder, as shown.A. What's the magnitude of the tension in the metal bar?B. What's the magnitude of the normal force exerted on the bottom right side of the ladder?C. What's the magnitude of the normal force exerted on the bottom left side of the ladder?D. What's the magnitude of the force the right side of the ladder exerts on its left side?

A cable weighing 4 kg/m is supported at the ends by two towers of the same height 100m apart. a. Flnd the sag at the center if the cable is 128.16m long. b. Find the tension at the lowest point of the cable. c. Find the tension at the highest point of the cable. A) a. 45.54m ; b. 610kg; c. 203kg B a. 35.54m ; b. 302.16kg ; c. 160kg c) a. 45.54m ; b. 160kg ; c. 203kg a. 44.45m ; b. 610kg ; c. 602.36kg E a. 53.54m ; b. 302.16kg ; c. 160kg