15. A mass of 5.2 kg placed 11 cm from the fulcrum produces a torque of ? 5.2 Nm, 0.57 Nm, 560 Nm, 51 N, or 5.6 Nm 16. Determine the displacement when a bird moves from 4 km[E] to 11 km[W]. 17. Which of the following might be the force due to gravity if the 50 N force upward on an object results in an acceleration of 0? none of these, 50 N up, 25 N down, 50 N down, 250 N down 18. A torque wrench is 55 cm long (from the fulcrum). What is the maximum torque that can be applied by a force of 4500 N? 19. A straight line on a d-t graph represents: constant velocity, no motion, a non-zero acceleration, a positive velocity, a changing velocity, a negative velocity 20. Determine the spring constant of a spring if 450 N compresses it by 2.5 cm? 21. What is the speed of a train that travels a distance of 480 km in 8.0 h? 22. How much pressure is there on a piston if the force exerted is 110 N and the area is 0.01 m*2? 23. Which of the following is the description of a first-class lever? a wheel with grooved rim in which a rope or cable can run, a lever with the load between the fulcrum and the effort, a lever with the effort exerted between the fulcrum and the load, a lever with the fulcrum between the load and the effort force, or A football moving downfield 24. What is the weight of a 2.5 kg book? .25. What is the compression of a spring if 457 N is applied to it and its spring constant is 105 N/m? 26. Determine the current passing through a resistor if the voltage is 1.5 V and the resistance is 150 0. . 27. If the spring constant is 55 N/m, how much force is needed to stretch this spring 2.0 m? 28. At what speed would a 1500 kg car be moving to have a kinetic energy of 2.1 x 10*6 J