A1.2 kg mass in placed on the end of a 1.4 m string. one end of the string is fixed, creating a simple pendulum. the mass is pulled to the side so that the string makes an angle of 8◦ with respect to the vertical and released from point a at t = 0. (a) what is the angular frequency of the system? (b) what is the maximum angular velocity of the pendulum? (c) what is the maximum linear speed of the mass? (d) at which point is the magnitude of the angular acceleration greatest? i. b ii. c iii. d

Which of the following is not a part of the respiratory system? a. pharynx b. trachea c. pancreas d. larynx

All the simple machines make work easier to do by changing the or of a force. a. size; type b. work; type c. size; direction d. type; direction

As you are trying to move a heavy box of mass m, you realize that it is too heavy for you to lift by yourself. there is no one around to , so you attach an ideal pulley to the box and a massless rope to the ceiling, which you wrap around the pulley. you pull up on the rope to lift the box. use g for the magnitude of the acceleration due to gravity and neglect friction forces. once you have pulled hard enough to start the box moving upward, what is the magnitude f of the upward force you must apply to the rope to start raising the box with constant velocity? express the magnitude of the force in terms of m, the mass of the box.