5 - Which of the following regarding mechanical energy is absolutely correct? A) Always protected B) The change in the mechanical energy of a system is equal to the work done on that system. C) It is the sum of kinetic and potential energies D) Preserved in environments where there is no friction force E) Protect in systems with conservative forces

Q: 2. If a man lifts a 20.0-kg bucket from a well and does 6.00 kJ of work, how deep is the well?…

A: solution is given as

Q: A 1250-kg car drives up a hill that is 16.2 m high. During thedrive, two nonconservative forces do…

A: The expression for the required change in kinetic energy,

Q: 6. Write a statement that describes the impact on the gravitational potential changing the mass of…

A: We know that gravitational potential energy is given by  GPE=mgh

Q: 13.A block is dragged across a floor with a force of 200N that acts at an angle of 90 degrees to the…

A: F= 200N Angle between force and displacement direction = 90° distance ,d = 3m

Q: 12. Work energy depends on the Path. Please discuss this in your own understanding and give example.

A: In thermodynamics we came across of two modes of energy transfer that is work and heat. Although…

Q: 1. You must exert a force of 4.5 N on a book to slide it across a table. If you do 2.7 Joules of…

A: To determine: The distance moved by the book   Given: Force applied on the book, F=4.5 N Work done…

Q: 2. Which statement best explains what happens to the mechanical energy of the system (roller…

A: Given data: Speed of the roller-coaster is increasing Required: Mechanical energy of the system

Q: 14. Describe the energy transfers and transformations for a javelin, starting from the point at…

A: Some system involves single energy transformation while there are some processes that involve more…

Q: QUESTION 3 What happens when a net force performs positive work on an object? O a. The object…

A: Work-energy theorem gives us a relation in b/w work & K.E. This theorem states that when at…

Q: A motorist driving a 147-kg car on level ground accelerates from 20.0 m/s in a time of 5.00 s.…

A: The kinetic energy of the car is, KE=12mv2KE=12147 kg20.0 m/s2KE=29400 J

Q: 2. Can the work done by the force of kinetic friction on an object ever be positive? If "yes," give…

A: Kinetic friction force : kinetic friction exist between two contact surface only when there is…

Q: 2.Work-Kinetic Energy Theorem. A truck of mass 3000 kg is to be loaded onto a ship by a crane that…

A: a work done by the crane = force exerted by crane × distance                     Wcrane=31,000 N2.00…

Q: 25. Review. You can think of the work-kinetic energy theorem GP as a second theory of motion,…

A: a) Let the mass of the bullet be denoted by m.The initial and final velocity of the bullet be…

Q: Problem#4: How much kinetic energy a nail with a of 8.5 g can mass acquire when it is struck by a…

A: Given: The mass of the nail is 8.5 g. The mass of the hammer is 0.5 kg. The initial speed of the…

Q: The kinetic energy of a system must always be positive or zero. Explain whether this is true for the…

A: The kinetic energy of the system is the energy possessed by the system by virtue of its motion and…

Q: 12. Find the maximum height reached by a ball thrown upward at a velocity of 95 ft/s.  do not use V…

A:

Q: 5. If the sign for work is negative, * O a. Kinetic energy is increasing. O b. Kinetic energy is…

A: work energy theorem. Work done is equal to change in Kinetic energy. W = K.E 2- K.E 1 K.E. 2 -…

Q: Question 4 Save Answer A force of 25N is applied on a block of mass 1kg allow it to move a distance…

A:

Q: the first four parts please

A: The mass of the piano (m)Distance (d)The angle of incline

Q: a-) Determine the work a hiker must do on a 15.0-Kg backpack to carry it up a hill of height…

A: a)Work done by hiker  w=mgh=15*9.81*10=1471.5J b)Work done by gravity  W=-mgh=-15*9.81*10=1471.5J

Q: 20. An 845-N sled is pulled a distance of 185 meters. The task requires 1.20 x 104 J of work and is…

A: Given data: The weight of sled is W=845 N. The distance traveled by the sled is d=185 m. The work…

Q: 1- An 18,000g object is accelerated at 2m / s', if the object is displaced 40m. What is the work…

A:

Q: tied to a body is pulled, causing the body to accelerate. But A rope according to Newton's third…

A:

Q: 3. A lawn mower is pushed a distance of 200 meters along a horizontal path by a constant force of 50…

A: Given that                 The force (F) = 50N                 Displacement(d) = 200m…

Q: 1. Renatta Gass is out with her friends. Misfortune occurs and Renatta and her friends find…

A: Given Cumulative force on the car = 242.752 lbf Net displacement of car = 715.258 ft We have to…

Q: RELATIONSHIP BETWEEN WORK AND ENERGY Theory: The net work done on an object always produces a change…

A: Mass of the bullet, m = 20 grams = 0.02 kg Initial velocity of the bullet, v0 = 250 m/s Final…

Q: Spring Mass system A 52 Ib mass stretches a spring 4 inches. Find the work done by the force to…

A: mass of object = 52 lb Change in length of spring = 4 inch = 0.333 ft

Q: 1o 10. A force is applied along the x-direction on a 5.00 kg object. The force varies along its path…

A:

Q: 1. You joined a "dogsled" race during your winter break. To start, you pulled the sled (total mass…

A:

Q: 2. Calculate the work done on an object as illustrated by the graph below. 16 12 of DISTANCE (m) -12…

A:

Q: 1- A cart is loaded with a brick and pulled at constant speed along an inclined plane to the height…

A: Note :-We’ll answer the first question since the exact one wasn’t specified. Please submit a new…

Q: 5. A person pulls an object of mass 40 kg as far as 20 m above a flat floor at a constant speed. The…

A: Mass of object =40kg Distance covered = 20m Force applied by man = 370N Coefficient of kinetic…

Q: 4. You throw a 20-N rock vertically into the air from ground level. You observe that when it is 15.0…

A:

Q: AGARWAL-PH <HW5 Item 4 Part A How much work must be done to stop a 1050-kg car traveling at 125 km/h…

A:

Q: 1. You lift a ball that weighs 200N up 3 meters a. What is the work accomplished b. What is the work…

A:

Q: QUESTION 5 Which of the following statements about energy is not true? The mechanical energy of a…

A: According to work energy theorem change in kinetic energy is equal to work done by both conservative…

Q: 1. A man cleaning a floor pulls a vacuum cleaner with a horizontal force of magnitude F = 32.0 N.…

A: The work done is defined as the product of force and the displacement in the direction of force.  W…

Q: 2. During your free time, you reassessed the interior of your house. You decided to move a 53.0-kg…

A:

Q: 11The longest shish kebab ever made was 881 m long. Suppose the meat and vegetables need to be…

A: The net work done on the cart and its content during the delivery is Wnet=Fappdcosθ-Ffd=(40.00…

Q: 1. Hans Full is pulling on a rope to drag his backpack to school across the ice. He pulls upwards…

A:

Q: tree trunk can be penetrated to a depth of 5.30 cm by a 7.80-g bullet traveling at 520 m/s. (a)…

A:

Q: Part 3: Example mechanical energy questions 1. A car weighing 5 500 kg, travels at a speed of 55…

A: Given that---- mass m = 5500 kg. Speed v = 55 km/h. Height h = 15 m. Question ❓  What is its…

Q: 1. A car gradually slows down as it brakes. From an energy perspective, this happens because of…

A: