moving elevator is lowered by a cable (not in system), and comes to rest at the zero level. What is the energy conservation equation?

Q: How is it possible to carry books to school without changing the kinetic or potential energy of the…

A: Given Data: Is it possible to carry books to school without changing the kinetic or potential energy…

Q: A skier slides straight down an incline of 25 degrees without using her poles.  The slope itself is…

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Q: Can you expend energy without doing any work? Given an example.

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Q: The rate at which work is done is known as .

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Q: "At a post office, a package of mass 1.3 kg is pushed down a slanted chute with an initial speed of…

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Q: Determine the amount of work, in Joules, done to lift a 500 kilogram piano 4 meters above the…

A: Mass of paino(m) = 500 kgHeight above ground (h) = 4mLinear mass density of cable = 5 kg/mLength of…

Q: ) How much work must be done on a heavy object to lower it from a height where it has 4000 J of GPE…

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Q: In 1990, Walter Arfeuille of Belgium lifted a 281.5 - kg object through a distance of 17.1cm using…

A: Given data:  Mass (m) = 281.5 kg Height (h) = 17.1 cm = 0.171 m The speed of the object is constant…

Q: Question 9) During a board game called Rat Trap0, mechanical contraptions are activated in a…

A: The given values are, m=50.0 g=0.05 kgEloss=2.0 Jhi=17 cm=0.17 mhf=4.0 cm=0.04 mvf=13 m/s

Q: In physics, what conditions must be satisfied if work is to be done?

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Q: It takes a minimum distance of 98.26 m to stop a car moving at 17.0 m/s by applying the brakes…

A: Given ; case -1 minimum stopping distance s=98.26m, initial velocity of car u=17.0 m/s final…

Q: Five equal books weighing 0.85 kg and 2.50 cm thick each lie on a table. Calculate the potential…

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Q: A 70 lb child runs uphill, gaining 50 feet in elevation in 14 seconds. Calculate the average power…

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Q: 79. An airplane pilot fell 370 m after jumping from an aircraft without his parachute opening. He…

A: if work W is done on the object then its KE changes by the magitude of W  the KE may increase or…

Q: weight lifter hold 900N over his head. Is he doing work on weight? EXPLAIN.

A: The work done by the weight lifter can be given as, W=F.d Here, F denotes the force on the object is…

Q: A firefighter slides down a pole with constant speed. What can you say about the energy?

A: Firefighter is slifing down tbe pole with constant speed.We know that potential energy is given by…

Q: What information can you use to estimate the peak power output humans are capable of, and how could…

A: How Peak Power Information Can Improve Athletic Performance For sports that require bursts of power,…

Q: m A person is pushing a wooden crate of mass mo = 20 kg at a constant speed vo = 1.2– for Ax = 3 m…

A: Given: Mass of the wooden crate, mo = 20 kg Speed of the crate, vo = 1.2 m/s Distance moved, ∆x = 3…

Q: n rain cloud at an altitude of 1.50 km contains 3.20 x 107 kg of water vapor. How long would it take…

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Q: An elevator in Goodtaste Baguio of 8 persons- capacity with a mass of 1750 kg plus unknown total…

A: Given information: The mass of the elevator (m) = 1750 kg The number of persons (n) = 8 The height…

Q: A 2 kg rock is thrown upward, with a speed of 5 m/s and returns to the same spot, with the same…

A: Give Mass m = 2 kg Initial velocity is U = 5 m/s in upward direction.  Final velocity is V = 5 m/s…

Q: Question 9) During a board game called Rat TrapO, mechanical contraptions are activated in a…

A: Recall  U=mgh KE=1/2mv2 by conservation of energy.

Q: A man cleaning a floor pulls a vacuum cleaner with a force of magnitude 60 N at an angle 45° with…

A: Work done: A force exerted on the body and total displacement of the body gives work done. Work is…

Q: A 98 kg bicyclist traveling 15 m/s coasts up a 5 m high incline. After reaching the top of the…

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Q: 12. A force is if the work it does around any closed path is zero.

A: A force is _________ if the work it does around any closed path is zero.

Q: The object was pushed up to speed v over a frictionless comb plane with an inclination of 30…

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Q: What can be said about the speed of a particle if the net work done on it is zero? explain briefly

A: Given  Net work done on particle is zero            Wnet = 0    According to work energy theorem ,…

Q: Is it possible that the work done by a force is negative? Give an example.

A: Yes it is possible for work done by a force to be negative.If the displacement happened in the…

Q: An electric elevator with a motor at the top has a cable weighing 4.5 pounds per foot. When the car…

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Q: Starting from rest, a 20.kg boy slides down from a slide that drops through a height of 2.2m with…

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