When nonconservative forces act, in what ways can mechanical energy change? Select all that apply.  Group of answer choices Mechanical energy can change direction. Nonconservative forces cannot change mechanical energy. Mechanical energy can increase. Mechanical energy can decrease.

Q: 2. Joshun pushed the block of ice with a force of 80 N at 25 from parallel. He pushed the ice 40 m…

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Q: A spring, whose unstretched length is 5 ft, stretches to a length of 9 ft when a force of 1 lb is…

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Q: A roller coaster starts from rest. Ignoring the effects of friction, where would the coaster's…

A: Potential energy of a body of mass m situated at height h from the ground is given by, U=mgh.…

Q: 7. A motor and cable apparatus lowers an elevator that is initially moving downward until the…

A: Given:An elevator moving downward with an initial velocity of vo from the height y.

Q: 010 FRAGILE The man pictured is standing still while holding up boxes. Which statement is true? The…

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Q: When nonconservative forces act, in what ways can mechanical energy change?

A: We know, that the mechanical energy is an energy that happens due to the motion and position of an…

Q: A mechanic uses a chain and bloc pulley to lift a 875-kg engine 4.0 m to the top of the garage. the…

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Q: A worker pushes a box (m = 2 kg) across a level floor with a constant speed of 1.0 m/s. Determine…

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Q: QUESTION 6 How much energy does it take to lift a 100 kg box from the floor to a 1.5 m high shelf?…

A: Given: m=100 kgh=1.5 m

Q: The total mechanical energy of the block is the sum of kinetic and potential energies.

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Q: 1. If you pushed a 20 kg box across the floor for a distance of 60 m with a force of 15 N how much…

A: #1 Given data: The mass of box is m=20 kg. The distance traveled by the box is d=60 m. The force…

Q: Choose the false statement regarding work done by a force on an object.   The amount of work…

A: Given information: Work is done on an object by applying a force.

Q: This is a potential energy graph as a function of position. You can also call the roller coaster…

A: Here we have the potential energy (U) v/s position (x) graph.

Q: A child sets a 2.5 kg block in motion by giving it a push along a floor. This gives the block a…

A: Given: The mass of the block is m=2.5 kg The initial velocity of the block is u=0 m/s The final…

Q: How fast will you be traveling at the bottom of the hill?

A: The values provided in the question are as follows- height of hill = 25m we want to find how fast…

Q: Below are SIX images. Each image shows a force and the displacement that happens while the force is…

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Q: Analysis: 1. Derived the formula for the height as a function of speed square without the presence…

A: Let us consider an object of mass m resting on a height h therefore the potential energy will be…

Q: Which of the following statements are true? Select all correct.     The equilibrium points on an…

A: Energy diagrams are the diagrams which show change in potential energy, kinetic energy with position…

Q: List the factors you need to measure to calculate the mechanical energy of the skater when he is…

A: In absence of any dissipative force ,mechanical energy of a system remains conserved .In such…

Q: When a child descends a sliding board in a playground, does the total macroscopic mechanical energy…

A: Macroscopic mechanical energy is the sum of the kinetic energy (the energy of motion) and the…

Q: Potential energy is said to be "stored" energy. True False

A: True / False : "Potential energy is said to be stored energy"

Q: 5. A 10 kg rock is released from rest at point A and slides on the path shown. Friction acts on the…

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Q: You observe a car of mass 500 kg, moving at speed 5 m/s, collide with a 100 kg trailer that was at…

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Q: Which of the following is the best example of increasing the potential energy of water? A pouring…

A: Since the gravitational potential energy of an object is directly corresponding  to its peak region…

Q: A car is moving along a road at 25.0 m/s with an engine that exerts a force of 2,475.0 N on the car…

A: Velocity of car,v=25 m/sForce exerted,F=2475 N