What is the work done by the force FD ? A. F,dcos(0°) B. F,dcos(60) C.F,dcos(90°) D. F,dcos(120) M.
Q: From the energy equation obtain the work W, spent on friction.
A: Conservation of energy Wf=∆KE+∆PE=12mv2-u2+mghf-hi=mv2-u22+ghf-hi
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A: Given value--- work = 500 J. time = 10 sec. We need to find--- Power ?
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Q: 6. Four students took turns applying a force to an object in a physics lab. The graph below shows…
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Q: QUESTION 4 The work done by any force can be calculated by using the formula W = F s cos(e) where…
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A: Given data: Displacement d→ = 27.0mi^ -22.0mj^ Force F→ = 178Ni^ -152Nj^ Required: Work done
Q: 4. I could better understand energy transfer if I ... Answer:
A: The capacity of doing work is called the energy of the body. The amount of work, that a body can do…
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A: Option C Is the right answer 1800 J
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Q: What is the work done by the normal force FN ? A. F,dcos(30) B. F dcos(45) C. F dcos(60) D.…
A: Let FN denotes the work done by the normal force and d denotes the displacement of the block along…
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A: Q. Given that Power consumed by lightbulb P = 25 W
Q: How much power is needed to lift a 750 kg elephant 14.3 m in 30.0 seconds?
A: Given data: Mass (m) = 750 kg Height (h) = 14.3 m Time (t) = 30.0 s Required: Power (P)
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- 2. A 900 kg elevator is raised by an electric motor up from the basement to the third floor, a vertical distance of 9.9 m, over the course of 5 s. There's a friction force of 125 N between the elevator and the elevator shaft. A. Draw a free body diagram of the elevator. Which forces are conservative? Which forces are dissipative? Which are external? B. How much potential energy does the elevator gain as its lifted? C. What is the work done by friction on the elevator? Is it positive or negative?42. A physics student applies a 21.6 N force downward at an angle of 57.2 degrees with the horizontal to displace a broom a distance 6.28 m to sweep up broken lab glass. Determine the work done by the student.A. 73.5 JB. 65.7 JC. 57.8 JD. 78 JQuestion 9 What does it mean when an object has positive work done on it by a force? Energy is flowing out of the object. Energy is flowing into the object. O The object's energy is not changing. Question 10 What does it mean when an object has negative work done on it by a force? The object's energy is not changing. Energy is flowing out of the object. Energy is flowing into of the object.
- Energy can be transferred between objects and it can change forms. a. Give an example of a situation where energy is transferred from one object to another. Make sure to describe which object started off with the energy and where the energy went. b. Give an example of a situation where energy changes from one type to another. Make sure to describe the original form of the energy, and what object causes the change in the type of the energy.The energy efficiency of electric vehicles is usually rated in terms of the kilowatt-hours (of energy) required to drive 100 miles, or kWh/100 mi. An electric car is rated at 38 kWh/100 mi. a. Is a vehicle rated 27 kWh/100 mi more or less efficient than this electric car? b. How much energy (in kilowatt-hours) is required to drive this electric car 260miles? c. Assuming electricity costs $0.14/kWh, how much does it cost to drive this electric car 350 miles?Pz
- A man pulls a 25 kg box in a horizontal fashion with 60N of force over a surface with us = 0.15 and uk = 0.05. a. After pushing it for 10m, how much thermal energy is produced? b. What is the net work done on the system? Draw a FBD.P В. A PA (Pa) 98 V VA (m³) 28 Vc (m³) 92 QABCA (J) 367 A.) Determine how much WORK the system would do going from A to C. B.) Determine how much WORK the system would do going from B to C.Will rate!! A Freebody diagram is foreign object is shown in the figure. FA = 420 N, FB = 300 N, FC = 275N, and FD = 295N. Assume angle left = 31degrees, and alpha =13 degree. How much work in (J) does FA do on the object if it moves 2.9 m downward?
- Which of the following statements are TRUE? A. Energy is a vector physical quantity. B. Energy is always required to do work. C. Totol mechanical energy can never be zero. D. When law of conservation of mechanical energy is invoked, there can never be a waste energy in an ideal system. E. When law of conservation of mechanical energy is invoked, there can never be a waste energy in a real-world system. F. Kinetic energy can be negative. G. Potential energy can be negative. H. Work is equivalent to the negative change in kinetic energy. I. Work is equivalent to the negative change in potential energy. J. In a conservative system where only gravitational force acts, the total mechanical energy is constant at every point of the motion. K. In a non-conservative system where certain external forces may act, the total mechanical energy is not constant at every point of the motion. L The entire universe may be considered as a closed system where the total energy is constant. chnices O B. D.…2. A spring that has spring constant k = 360 N/m is compressed by x = 9 cm. When the spring is released, all its energy is transferred to a 22 g marble ball.A.determine the work done by the force on the particle with the appropriate units. B.what is the angle between the force and the particles displacement.