Two blocks of mass m = 15 kg and mg = 10 kg are connected by a massless string that passes over a pulley as shown in the figure below. The system is in static equilibrium. There is friction between Block A and the surface (u,-0.7) but neglect the friction between the string and the pulley. What is the static friction force on Block A? Pulley String 98.0 N 49.0 N 147 N 103.0 N O ON
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- I have a shelf full of textbookd.Each book has a mass of 1.0 kg and mus=0.3. a. How hard do I need to push horizontally to unstick the top book from the rest of the pile? b. How many books can I unstick from the top of the pile if I push with a force of 16N?A wniform ladder 15 ft long is leaning against a frnctionless wall at an angle of 53° above the horizontal. The weight of the ladder is 30 pounds. A 75-lb boy climbs 6.0-ft up the ladder. What is the magnitude of the friction force exerted on the ladder by the floor? a. 24 lb b. 34 lb с. 43 lb d. 38 lb e. 47 lbe.co CU ct sona- n ect Pool artment... W 24,919 8. A mass m₁ = 9.00 kg is connected by a light string that passes over a pulley of mass M = 14.0 kg to a mass m₂ = 12.5 kg sliding on a horizontal frictionless surface (see figure). There is no slippage between the string and the pulley. What is the magnitude of the tension that is acting on mass m₂? (The moment of inertia of the pulley is ½/Mr².) N # 3 20 $ 4 R 999 F4 % 5 FS ^ 6 tv © MacBook Air Y & 7 m₂ F7 * 8 Dall 1 ( 9 M m₁ A 02 DD ) 0 P ISULI H by mi 04 M vauies or roe puffer
- This problem concerns the concept of tension in a rope. Consider a rope subjected to a pulling force on its two ends as shown in (Figure 1). The rope is stationary. An arbitrary point P divides the rope into a left-hand segment L and a right-hand segment R. Figure wi L pull R 232 pull 1 of 3 Part A For segment R and segment L to hold together, they must exert forces on each other. What is the direction of the force exerted on segment R by segment L? View Available Hint(s) left right Submit Part B FLR Assume that segment R exerts a force of magnitude T' on segment L. What is the magnitude FLR of the force exerted on segment R by segment L? Give your answer in terms of T and other constants such as g. ► View Available Hint(s) = Submit % ΑΣΦ www ?A box of mass M = 50 kg rests on a rough (ji) horizontal surface. When a force F = 300 N is acted on the box as %3D %3D shown in the figure below, the box becomes on the verge of slipping (Y alig de j gainall ). The coefficient of static friction of the rough surface is: F A. 0.92 B. 0.75 40° C. 0.14 D. 0.57 E. 0.34A rope attached to a 500-lb block passes over a fric- tionless pulley and is wrapped for one full turn around a If the coefficient of frie- tion between the rope and the post is 0.25. determine fixed post as shown in Fig. The minimum force P that must be used to begin to raise the block. P W
- A block of mass m sits at rest on a rough inclined ramp that makes an angle with the horizontal. What must be true about normal force F on the block due to the ramp? OA. F= mg cos9 OB. F>mg OC.F>mg sin OD. F> mg cos OE. F=mg sinThe system shown in figure is in equilibrium. If the static coefficient of friction between the block (m = 3 kg) and the wall is 0.2 and 0 = 30°, the tension in the cord is (in N) Select one: O a. 28.23 O b. 38.57 Oc. 31.06 O d. 35.64 Finish attempt .. A E A ENG 4/4. A 50 kg man stands on the middle rung of a 50 kg ladder as shown. Assuming the floor and wall are perfectly smooth and that slipping is prevented by a string DE. a. Find the reaction at B. b. C. Find the reaction at A. Find the tension in string DE. 12m 150 kg 50 kg 6m 30% B E
- ebAssign 110 N 40 ASK YOUR TEACHER 3. DETAILS SERCP11 4.7.P.065.MI. Objects with masses m, = 15.0 kg and m, = 8.0 kg are connected by a light string that passes over a frictionless pulley as in the figure below. If, when the system starts from rest, m, falls 1.00 m in 1.78 s, determine the coefficient of kinetic friction between m, and the table. 4. DETAILS SERCP11 5.2.OP.015. ASK YOUR TEACHER A 7.80 g bullet is initially moving at 620 m/s just before it penetrates a block of wood to a depth of 5.80 cm. (a) What is the magnitude of the average frictional force (in N) that is exerted on the bullet while it is moving through the block of wood? Use work and energy considerations to obtain your answer. (b) Assuming the frictional force is constant, how much time (in s) elapses between the moment the bullet enters the block of wood and the moment it stops moving?A 50-kg block is suspended as shown. The beam is weightless and is hinged to the wall at A. The tension force of the cable T has magnitude: (Use g = 9.8 m/s²) 3m -4m block O a. 620 N O b. 980 N O c. 1143 N O d. 817 N e. 1607 NLETTER ONLY 1. A Jollibee delivery man travels 5 km, North and then 3 km, East to deliver the order. What is angle from the + x- axis is the delivery man? A. 31^o B. 95^o C. 59^o D. 56^o 2. Which of the following is the MOST difficult to start moving? A. A box on the floor with a weight of 100 N and has a coefficient of static friction of 0.45. B. A 550 N cart and with a coefficient of static fiction with the floor of 0.2 C. A 250 N metal crate and with a coefficient of static friction of 0.6 with the floor. D. A 50 N rolling tray and with a coefficient of static friction of 0.1 with the ground.