Chapter 15, Problem 50P

The spring-mounted 0.82-kg collar A oscillates along the horizontal rod, which is rotating at the constant angular rate À = 9.1 rad/s. At a certain instant, r is increasing at the rate of 850 mm/s. If the coefficient of kinetic friction between the collar and the rod is 0.56, calculate the friction force F exerted by the rod on the collar at this instant. Vertical 0 Answer: F= i Attempts: 0 of 3 used Submit Answer eTextbook and Media Save for Later N

The man tries to reposition the 50 kg refrigerator in his kitchen by pushing it from rest with a force P = 170 N, inclined 30° from the horizontal at 1.60 m from the floor. The coefficient of non-sliding friction between the floor and the refrigerator is μs = 0.40.After pushing, the refrigerator started to tip. Which of the following quantities is ZERO at the instant described in the problem?a. friction at Ab. body's angular accelerationc. body's angular velocityd. the acceleration of mass center G  Which of the following values is closest to the magnitude of the angular acceleration of the refrigerator?a. 7.57 rad/s^2b. 2.50 rad/s^2c. 1.892 rad/s^2d. 1.877 rad/s^2

the 75 n crate is released from rest in incline surface at time t=0. The coefficient of kinetic friction between the crate and the surface is 0.14. How fast the crate is moving at t=1.5s