A metal box having a mass of 100.0kg is pulled along a level plane, at uniform speed, by a horizontal rope applying a force of 325 N. An additional mass of 40.0 kg is now added to the box. What must be the force in the rope to move the box at uniform speed? If the rope will not transmit a force of more than 500.0 N, what is the greatest mass which can be added to the box?

For the next three items: A 200 kg plank is projecting a distance L = 5.0 m from a wall which is held steadily by a string that is connected to it at an angle = 30° from the horizontal. The plank is actually fasted to the wall where an unknown force F is exerted on the plank by the wall. If a 60 kg mass is placed on the plank at a distance d = 1.0 m, find the tension force on the string. Ө d O 1300 N O 4200 N O 1600 N O2200 N L-

An elevator has a mass of 200kg. An average person has of 40 kg. The elevator must accelerate upward at 3 m/s^2. If the elevator cable is capable of supporting 6500 N of tension before it breaks. What is the maximum number of people you could have on board?

Bob is pulling a box of his toys of mass 15.0 kg along a rough horizontal surface for a distance of 6.00 m. The tension force in the rope is 58.0 N and the angle is 30° with respect to the horizontal. The frictional force on the box is 18.0 N. Match the answers with questions. (Hint: Clearly draw the force vector and displacement vector for all cases.) What is the angle between the tension force vector and the displacement vector? A. 90° v What is the angle between the friction force vector and the displacement vector? B. none of the given v What is the angle between the normal force vector and the displacement vector? C. 60° D. 150° Е. 0° F. 210° G. 180° Н. 30°