Question

12. A 3.0 m long and 2.0 m wide carton of mass 100 kg leans against a smooth wall as shown in the figure The coefficient of state friction between the floor and the lower end of the carton is 0.80. The normal for the a 240 N h TOON c. 980 N d. 80N e. None of the above A 2.0 m long, 200 N uniformladder, rests with one end against a smooth wall making an angle of 30 with the wall. The coefficient of static friction between the ground and the lower end of the ladder is 0.5. A force F pushes the upper end of the ladder parallel to the wall so that the ladder is on the verge of starting to slip down (static friction has reached its maximum value). The torque of the weight of the ladder relative to the lower end in the ground is: F a. 200 Nm b. 620 Nm c. 46 Nm d. 400 Nm e. None of the above An astronaut in space swings a mass on the end of a 2.0-m long thin cord in a circular path increasing its angular speed by 1.5 revis cach second. The tangential acceleration is: a 3.0 m/s b. 3x m/s2 c. 2x m/s? d. 6 m/s e. None of the above

Answer 1

As HOMEWORKLIB RULES rule I have done 1 question please post other as separate question.