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: By how much does the gravitational potential energy of a 52-kg pole vaulter change if her center of…

A: Given data The mass is m=52 kg The change in height is, ∆h=4.0 m

Q: Calculate the gravitational potential energy of a 13.5 kg box on a shelf 7.0 m above the floor.…

A: Given data :              Mass  =  m              Height  =  h             Gravity  =  g        To…

Q: A 45.2-g golf ball is driven from the tee with an initial speed of 42.4 m/s and rises to a height of…

A:

Q: Two masses are attached via a sturdy rope. The rope is wrapped around a pulley, and the heavier mass…

A: Elastic potential energy is the energy stored by the deformation of an elastic object, such as the…

Q: The total energy required to move a 10-N block up a 25-degree incline for 10 meters is 500 Joule. A…

A: We need to calculate the applied force, rate of work done by the force and the initial velocity of…

Q: A weightlifter lifts a 50 kg bar from the floor to a position over his head and back to the floor…

A: To find energy transformations that has taken place, by the weightlifter. Given, Mass of bar, m = 50…

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

A:

Q: A 0.13-kg ball is thrown upward with an initial speed of 12 m/s, Calculate the gravitational…

A: Given, Mass of ball (m) = 0.13 kg Thrown Upward with initial velocity (v)= 12m/s We want to find…

Q: By how much does the gravitational potential energy of a 58- kg pole vaulter change if her center of…

A: m=58 kgh=4 mg=9.81 m/s2

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: A car with a sleeping person inside sits at the top of the hill when suddenly it begins to roll down…

A:

Q: A monkey carries a coconut of mass 2 kg to a height of 10 m above ground and later releases the…

A: (a) Calculate the potential energy of the monkey. PE = mgh      = 2*9.81*10      = 196.2 J

Q: A car weighing 500 kg moving against a resistance of 500 N, accelerates from rest to 20 m/s in 100…

A:

Q: In the force non- conservative, the * work done depends on final point initial point The initial and…

A: The force is classified into two catogories:- Conservative force  Non-conservative force

Q: Calculate the gravitational potential energy of a 12• 3 kg box on a shelf 7.0 m above the floor.…

A: Given that                   The mass of the box is (m) = 12.3 Kg                   Height of the…

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: A crate is given a push across a horizontal surface. The crate has a mass m, the push gives it an…

A: The work done by the push on the crate is converted into kinetic energy, which is then dissipated by…

Q: Question 16 A 2.9-kg cannonball is fired straight up with an initial velocity of 39 m/s. Taking the…

A:

Q: At what height does a 100 (N) load have a potential energy of 10 (J) relative to the ground?

A: The expression for potential energy (PE) is given as, PE = F×h, where 'F' is the force and 'h' is…

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…

A:

Q: A 69.0 kg diver is 3.30 m above the water, falling at speed of 4.60 m/s. Calculate her kinetic…

A: Given  Mass of diver m= 69kg Initial Height of diver hi = 3.30m Initial speed of diver Vi = 4.60m/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…

A:

Q: A 10,000 kg streetcar starts from rest when the conductor powers on the electric drive motor. If…

A:

Q: An engineer is trying to determine the mass of a student who will barely touch the water when…

A: Let x denotes the change in the cord’s length, l denotes the natural length of the cord, h denotes…

Q: The gravitational potential calculation was larger than the direct measurement based on velocity.…

A: The total energy of the system is always conserved so the central concept behind the concept is not…

Q: A roller coaster is pulled up to a point A, 30.0 m above the ground where it and its screaming…

A:

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

A:

Q: A car of mass m starts from rest and accelerates so that the instantaneous power delivered to the…

A:

Q: An adult weighing 600 N raises the centre of gravity of his body by 0.25 m while taking each step of…

A:

Q: Ms. Dewitte's son, Theo, slides down a slide, from rest, with a length of 2.00 m at an incline of…

A: The height of the slide from the ground is, h = (length of slide)sin50° = 2sin50° = 1.53m Assuming…

Q: An elevator of mass 500 kg descends with an acceleration of 2 m/s^2 for a distance of 12 metres.…

A: Force brings about motion and changes in it. This force produce acceleration and hence the changes…