What is the average useful power output (in W) of a person who does 5.20 ✕ 106 J of useful work in 8.40 h? _______W   Working at this rate, how long (in s) will it take this person to lift 2300 kg of bricks 1.70 m to a platform? (Work done to lift his body can be omitted because it is not considered useful output here.) ________s

Q: A 60 kg hiker climbs to the top of a 4200 m -high mountain. The climb is made in 6.0 h starting at…

A: Since you have posted a question with a multiple sub parts, we will solve first three sub - parts…

Q: An 860 N box is pushed across a level floor for a distance of 4.2 m with a force of 420 N. How much…

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Q: A 213 kg crate slides 7.6 m until coming to a stop after being pushed by a large man. The effective…

A: Given data: Mass (m) = 213 kg Displacement (d) = 7.6 m Coefficient of kinetic friction (μk) = 0.37…

Q: A block with a mass of 43.0 kg is pushed with a horizontal force of 150 N. The block moves at a…

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Q: A box is pushed horizontally though a displacement of 5.0 metres by a force of 55 Newtons.…

A: Given: The applied force is 55 N. The displacement of the object is 5 m. The work done by non…

Q: If it requires 4.0 J of work to stretch a particular spring by 2.0 cm from its equilibrium length,…

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Q: A person pushes a large box with a mass of 70 kg across a horizontal floor as shown in Figure 3. The…

A: Work done by a force(F) for moving a object distance(s) is given by: W=F.s cos(x)  x= Angle between…

Q: 1.A person is pushing a box across a floor. Can the frictional force on the box ever exceed its own…

A: We are authorized to answer one problem at a time, since you have not mentioned which one you are…

Q: Two men, Joel and Jerry, push against a wall. Jerry stops after 10 min, while Joel is able to push…

A: time for which the jerry pushes against the wall = 10 min tiem for which the joel pushes against the…

Q: You push a stalled car with a constant force of 235 NN as it moves a distance 8.40 mm in a straight…

A: Work done  W=Fdcosθcosθ=WFdθ=cos-1WFd

Q: A trunk of mass m = 2.0 kg is pushed a distance d = 158 cm up an incline with an angl of inclination…

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Q: How much work must you do to push a 12 kg block of steel across a steel table at a steady speed of…

A: mass of block of steel (m) = 12 kg constant speed (v) = 1.3 mstime (t) = 7.7 seconds μk = 0.6

Q: How much work is done when you push a crate horizontally with 120 NN across a 11-mm factory floor?…

A: The work done is given by  W  F x d  where, F is the force in the direction of  displacement and d…

Q: In the figure below, the force component Fcos e reaches a maximum at s = 0.306 m. Find the…

A: Are of one block, a=9×2.78xx10-2 J Area under the force-displacement graph is called work done.…

Q: An Olympic weightlifter lifts a 2200 N barbell a distance of 2.2 m. This takes 1.80 s. a.     Find…

A: Data Given ,  1 kg mass exerts a force of about 9.8 N So , 2200 N = ( 2200 / 9.8 ) kg = 224.5 kg So…

Q: A. How much work is done by w⃗ ? Express your answer using three significant figures. W =…

A: a)The required work done is,

Q: The force on a particle is directed along an x axis and given by F = Fo(x/xo - 1) where x is in…

A: Force is  ; here  is in  and force  is in Values are  and Note:Find:Work done on moving a particle…

Q: A 1390 kg car accelerates uniformly from rest to 10.4 m/s in 2.87 s. Find the work done on the car…

A: Given:   Mass of car, m= 1390 kg Initial velocity of car , u = 0 Final velocity of car, v = 10.4 m/s…

Q: A cheerleader lifts his 68 kg partner straight up off the ground a distance of 0.72 m before…

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Q: 1. A 500 – N box is pushed across a horizontal floor with a force of 250 N. The coefficient of…

A: Given: N=mg=500 kg (N is the reaction force) Force, F=250 N Co-efficient of kinetic friction, μ=.40…

Q: An 8.10 kg package in a mail-sorting room slides 2.30 m down a chute that is inclined at 51.8…

A: Free body diagram of the package is-

Q: A student lifts a 2.1‑kg physics book to a height of 64 cm and then puts it down to its original…

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Q: 28. Ssscalar. A box of mass 20.0 [kg] slides down from the top of a surface inclined at 50.0° with…

A: mass = 20 kg θ = 50oh = 10 m μk = 0.35

Q: How much work does it take to stretch the spring 0.4 m?

A: If a spring is compressed by a length x by the force F then by Hooke's law…

Q: mg W crane (a) How much work does the crane do on the crate? Enter to 3 significant figures = crane…

A: Mass of the carte (m) = 209 kg Height (H) = 20.0 m

Q: A force and a displacement are given in component form. What is the work done by this force?…

A: →F=5i+2j+k N→∆r=2i-3j+2k m

Q: Mr. Mangan pushes a 90 kg box across a rough surface with a force of 300 N over a displacement of 5…

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Q: A force of 5 N is required to hold a giant spring stretched 1 m beyond its natural length. How much…

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