You push on a rectangular door at the location of the knob (see diagram for top view). The door s mass is 62.6 kg, and its side-to-side width is 2.28 m. The knob is located 0.14 m from the right-hand side of the door. If you push with a force of 180 N, what will the be the door s angular acceleration as it swings on its hinges? (Note: the moment of inertia of the door of mass M and width x, swinging on its hinges, is (1/3) M x^2.)     5.68 rad/s^2     0.85 rad/s^2     3.55 rad/s^2     1.42 rad/s^2

An Atwood's machine consists of blocks of masses m1 = 13.0 kg and m2 = 16.0 kg attached by a cord running over a pulley as in the figure below. The pulley is a solid cylinder with mass M = 9.10 kg and radius r = 0.200 m. The block of mass m2 is allowed to drop, and the cord turns the pulley without slipping. (a) Why must the tension T2 be greater than the tension T1? (b) What is the acceleration of the system, assuming the pulley axis is frictionless? (Give the magnitude of a.) =________ m/s2 (c) Find the tensions T1 and T2. T1= ______N T2= _____N

The triceps muscle in the back of the upper arm extends the forearm. This muscle in a professional boxer exerts a force of 1559 N with an effective perpendicular lever arm of 3.25 cm, producing an angular acceleration of the forearm of 110.0 rad / s?. What is the moment of inertia of the boxer's forearm? moment of inertia: kg m?

You push on a rectangular door at the location of the knob (see diagram for top view). The door s mass is 72.8 kg, and its side-to-side width is 1.65 m. The knob is located 0.15 m from the right-hand side of the door. If you push with a force of 133 N, what will the be the door s angular acceleration as it swings on its hinges? (Note: the moment of inertia of the door of mass M and width x, swinging on its hinges, is (1/3) M x^2.)