Energy is ________ a) Work b) The ability to create work c) Quantification of work d) Force multiplied by displacement
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Energy is ________
a) Work
b) The ability to create work
c) Quantification of work
d) Force multiplied by displacement
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- A force, varying with distance as shown in the graph below, acts on a 5.5 kg object. When is most work done, in the first 4 meters or between 4 and 6 meters? Explain your response. 4.0 3.0 2.0 1.0 2.0 4.0 6.0 8.0 Find the work done by the force in moving the object from 0 m to 6.0 m. Explain your calculation and give units. Figure 9-15 C. Assuming that there is no friction or air resistance what is the total change in the object's energy? Explain your answer. b. FORCE (N)1- An object is constrained to move inside a vertical ring near the surface of Earth as shown in the picture. Answer the following questions: What are the forces acting on the object b) is the work done by each force zero, positive or negativel SWork and Kinetic Energy- WE-1 Two forces act on a 15.0kg block that is displaced 3.00m along a frictionless surface in the --x direction as shown below. Final Position Initial Position F1=15.0N > F2=10.0N V24 3.00m frictionless a) Calculate the work done by F1. b) Calculate the work done by F2. c) Calculate the net work done on the block. d) Find the change in kinetic energy of the block. Show al
- The unit of work, joule, is dimensionally the same as: a. Newton‑meter b. Newton/kilogram. c. kg•m2/s2 d. a and c e. a and b f. b and cQUESTION 5 Which of the following statements about energy is not true? The mechanical energy of a physical system is constant when the forces acting on the system are all conservative forces. a. O b. According to the work-energy theorem, the forces that contribute to the net work include all the conservative and nonconservative forces. c. The total energy of the universe is always conserved. O d. Energy can change form, but it cannot be created or destroyed. O e. Mechanical energy is always conserved ONHQuestion on Physics - Unit - Work and Energy Which of the following statement correctly describes the relationship between an objectsgravitational potential energy and its height above the ground? A. Proportional to the square of the objects height above the groundB. Directly proportional to the objects height above the groundC. Inversely proportional to the objects height above the groundD. Proportional to the square root of the objects height above the ground
- QUESTION 5 If an object is confined to move along some surface, the normal force from the surface does work on the object. True FalseA sprinter is practicing exiting the starting blocks with a large amount of power. What can the sprinter do to increase their power? A. Perform more work in the same amount of time B. Apply the same amount of work in a longer amount of time C. Perform the same amount of work in a longer amount of time