(a) What is the average useful power output of a person who does 6.00x10^6 J of useful work in 8.00 h?  (b) Working at this rate, how long will it take this person to lift 2000 kg of bricks 1.50 m to a platform?

Q: (a) What is the average useful power output (in W) of a person who does 5.00 x 106 J of useful work…

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Q: (a) How long (in s) will it take an 865 kg car with a useful power output of 38.0 hp (1 hp = 746 W)…

A: Work energy theorem formula: W=change in kinetic energy     =∆K      =Kf-Ki      =12mvf2-12mvi2…

Q: A skier of mass 62 kg is pulled up a slope by a motor-driven cable. (a) How much work is required to…

A: mass of skier (m) = 62 kg distance pulled (d) = 50 m Angle of incline (θ) = 30oConstant speed (v) =…

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A: 1)weight of car = 1290 N distance travelled = 200 m

Q: 3) A person uses a constant force to push a 14.0 kg crate 1.80 m up a frictionless 10⁰ incline and…

A: This problem can be solved using Newton's second law of motion and work energy theorem.

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Q: A skier of mass 61 kg is pulled up a slope by a motor-driven cable. (a) How much work is required to…

A: Given:Mass = 61 kgDistance to be covered = 55 mAngle = 30oSpeed = 2.1 m/s

Q: A skier of mass 63 kg is pulled up a slope by a motor-driven cable. (a) How much work is required to…

A: Given:- mass of the skier m= 63 kg height h= 40 m slop is The speed of the skier is v= 2.3 m/s…

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Q: 1. (a) What is the average useful power output of a person who does 7.00 x 106 J of useful work in…

A: average power output is given bywhere, is the work done is the time of work done.

Q: To compress a spring 5.00cm from unstretched length, 12.0 J of work must be done. How much work must…

A: The net force acting on an object is equal to mass times the acceleration of the object. An object…

Q: A skier of mass 78 kg is pulled up a slope by a motor-driven cable. (a) How much work is required to…

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Q: A74.0 kg person climbs stairs, gaining 3.50 meters in height. Find the work done (in J) to…

A: Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: A force of 11.48 Newtons was exerted by a spring to restore its original length from 124-cm to…

A: Force exerted by the spring is F=11.48 N Change in the length of the spring is x=(124-15) cm=109…

Q: A force of 38.59 Newtons was exerted by a spring to restore its original length from 102-cm to…

A: Write the given values with the suitable variables. F=38.59 Nx1=102 cm=1.02 mx2=42 cm=0.42 m Here,…

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Q: During an energy-efficiency test, a student pulls a toy car up a ramp that is 2.5 m long. The…

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Q: A skier of mass 61 kg is pulled up a slope by a motor-driven cable. (a) How much work is required…

A: (a)   The work required to pull the skier on the slope can be determined as follows. W=Fsloped=61…

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Q: A force of 13.81 Newtons was exerted by a spring to restore its original length from 109-cm to…

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Q: 3. A force of 10 N is applied to a small cart for a distance of 2.0 m. (a) What work is done on the…

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Q: To compress a spring 5.0 cm from its unstretched length, 18.0 J of work must be done. (a) What is…

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Q: A skier of mass 71 kg is pulled up a slope by a motor-driven cable. (a) How much work is required…

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Q: A skier of mass 77 kg is pulled up a slope by a motor-driven cable. (a) How much work is required to…

A: Distance for which he was pulled,d= 55m Angle of slope with horizontal= 30°

Q: It takes 1700 J of work to stretch a spring from its natural length of 1 m to a length of 5 m. Find…

A: Work done = 1700 J natural length = 1 m final length = 5 m

Q: (1) Suppose you lift a stone that has a mass of 5.1 kilograms off the floor onto a shelf that is 2.5…

A: According to question we need to find work done .

Q: (a) What is the average useful power output of a person who does 6 x 106 J of useful work in 7 hr?…

A: Given data:   Work (W) = 6×106 J Time (t) = 7 hr Required: Power (P)

Q: 1. (a) How long will it take a 1050-kg car with a useful power output of 181 hp (1 hp equals 746 W)…

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Q: A mountain climber is about to haul up a 90-m length of hanging rope. How much work will it take if…

A: The length of the hanging rope is 90 mweight of rope =0.65N/m

Q: A rope that weighs 0.5 lb/ft is attached to a bucket filled with cement plaster that weighs 22 lbs.…

A: Given, the weight density of the rope is ρ=0.5lb/ft And the weight of plaster is wb=22lb It lifted…

Q: What is the average useful power output (in w) of a person who does 6.80 x 106 J of useful work in…

A: Given: Work done by the person, W = 6.80 × 106 J time taken to complete it, t = 7.60 h = 7.60 h ×…

Q: A force of 45.6 lb is used to push a box 10.3 ft across a level floor. (a) How much work was done on…

A: Given,  Force acting on the box, F = 45.6 lb Displacement of box, x = 10.3 ft For calculating work…

Q: A force of 19.91 Newtons was exerted by a spring to restore its original length from 87-cm to 14-cm.…

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Q: 19. Two forces are acting on a block with F₁-25 N making an angle 0₁-37° with the horizontal and…

A: We are given 2 forces. We are also given the displacement. We first resolve the forces and find the…