What average mechanical power must a 70.0 - kg mountainclimber generate to climb to the summit of a hill of height325 m in 45.0 min? Note: Due to inefficiencies in convertingchemical energy to mechanical energy, the amount calculatedhere is only a fraction of the power that must be produced bythe climber’s body.

Q: As part of a charity fund raising drive, a runner with mass 50.0 kg runs up the stairs to the top of…

A: Mass of the runner=50kgHeight=443macceleartion due gravity=g=9.8m/s2Increase in potential…

Q: A 1,505 kg car starts at rest and speeds up to 4.2 m/s with a constant acceleration. If the car…

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Q: A 50.0-kg marathon runner runs up the stairs to the top of Chicago’s 443-m-tall Willis Tower.…

A: Given: m = 50.0 kg h = 443 m t =15.0 minutes = 15.0*60 sec = 900 sec

Q: A bag of wheat weight 320 kg. To what height should it be raised so that potential energy is 6790J?…

A: Given data :                Acceleration due to gravity    =   g                  Potential energy…

Q: A cyclist in a race must climb a 5° hill at a speed of 8 m/s. If the mass of the bike and the biker…

A: Given: The angle of inclination of the hill = 50 Speed of the cyclist = 8 m/s Mass of the bike and…

Q: What is the net work of a system if there is an applied force pushing it at a value of 7887.04N at a…

A: Given, Pushing force , F = 7887.04 N Distance, s = 26.62 m Coefficient of kinetic friction, μk =…

Q: Cite an example in which a force is exerted on an object without doing work on the object.

A: The work done will be zero when the applied force on an object is perpendicular to the displacement…

Q: What is the net work of a system if there is an applied force pushing it at a value of 5667.61N at a…

A: Solution: Given that applied force F=5667.61 N distance, d = 20.15 m kinetic friction coefficient…

Q: In scaling a vertical wall, spiderman needs 3.1 kW of power to maintain a speed of 4.5 m/s. If…

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Q: An apple weighing 1 N falls throughas a distance of 1 m. How much work is done on the apple by the…

A: weight of apple(W)= 1N Distance(d)=1m Work done=F.d=Fdcosθ F is force θ is angle between force and…

Q: Find the work done by 45N force in pulling the suitcase at an angle of 50d egrees with respect to…

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Q: A car could accelerate from rest to 60 mi/hr (27 m/sec) using a 302 V8 in a time of 1.2 sec.  If the…

A: solution

Q: Calculate the work needed for a 65 kg tourist to climb to the top of the great pyramid in Egypt with…

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

Q: A jet engine develops 10^5 N of thrust in moving an airplane forward at a speed of 900 km/hr. What…

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Q: What is the current total mechanical energy of a 70-kg skydiver whose speed is 62 m/s at an altitude…

A: The kinetic energy of a body of mass m and speed v is given by, K = 12mv2 The potential energy for…

Q: The power delivered by a constant force is given by P=FO-vO, The power exerted by gravity as it…

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Q: A big man is towing a large box with a cord that makes an angle of 25 degreeswith the horizontal.The…

A: Force applied on box = 100 N displacement of box = 2 meter angle between force and displacement…

Q: One species of Darwin’s finch, Geospiza magnirostris, can exert a force of 217 N with its beakas it…

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Q: Suppose your mass is 83.5 kg and you climb 40 stairs of height 18 cm in 16.0 s. What is your power…

A: (given)                             Mass = 83.5 kg                           Total distance =…

Q: A race car travelling on a straight and flat stretch of track must overcome 1.5 kN of resistance to…

A: Given : F = 1.5 kN = 1.5 x 103 N v = 190 km/hr = 190 x 1000/3600 = 52.78 m/s

Q: If a ski lift raises 100 passengers averaging 660 N in weight to a height of 150 m in 60.0 s, at…

A: Given information: Here, mg is the average weight of the passenger, h is the height attained by the…

Q: Calculate the power output in watts and horsepower of a shot-putter who takes 1.20 s to accelerate…

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Q: A cyclist in a race must climb a 4° hill at a speed of 5 m/s. If the mass of the bike and the biker…

A: The mass of the bike and the biker together, m=73 kg   The speed, v=5 m/s   The angle, θ=4°

Q: In climbing up a rope, a 62-kg athlete climbs a vertical distance of 5.0 m in 9.0 s. What minimum…

A: Given Data: The mass of an athlete is m=62 kg The vertical distance is, d=5 m The time required to…

Q: A student lifts a weight of 10.0N a distance of 0.5 meters. If this exercise is repeated 50 times in…

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Q: Suppose a 51.5-kg woman does 50 deep knee bends in which her center of mass is lowered and raised…

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Q: Suppose a 925-kg car climbs a 2.05° slope at a constant speed of 30.5 m/s.   Calculate the power…

A: Since, the car climbs the slope with a constant velocity, the expression for the power required is,

Q: Calculate the average power necessary for a 55.8 kg person to run up a 5.0 m high, sloped hill, in…

A: The expression for the average power is P=Wt Here,P  is the average power,  iWs the work done by…

Q: A bag of wheat weight 450 kg .To what height should it be raised so that potential energy is 8950J ?…

A: Write the given values with the suitable variables. m=450 kgP=8950 J Here, m is the mass and P is…

Q: What distance can a crane lift a 55.0 N box, if it expends work of 2.00 x 104 Joules?

A: given ;    force, F = 55.0 N , work done = 2.00 x 104  Joules  formula used;     W = F x d   where,…

Q: What is your average power if you lift a 36.1 kg box at a constant speed to a height of 1.31 m in…

A: Calculate the work required for the to lift the mass. W = increase in potential energy of the mass…

Q: Suppose a 825-kg car can produce a useful power output of 45.5 hp (1 hp = 746 W). How long, in…

A: a)Calculate the work done using work energy theorem.

Q: • A 1300-kg elevator is lifted at a constant speed of 1.3 m>s througha height of 22 m. How much…

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Q: How much work must you do to push a 11.0 kg block of steel across a steel table (μk=0.6)at a steady…

A: a) The required work done is,

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 small motor runs a lift that raises a load of bricks weighing836 N to a height of 10.7 m in 23.2…

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Q: What average mechanical power (in W) must a 70.5 kg mountain climber generate to climb to the summit…

A: Write the given values with suitable variables. m=70.5 kgh=305 mt=47 min=47×60 s=2820 s Here, m, h,…

Q: The horizontal and vertical velocity components of a 2.0 Kg projectile are Vh = 30 m/s and Vv = 40…

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Q: How do I set this problem up? What average power does a weightlifter need to lift 225 lb a distance…

A: The average power is given as                                   P = W/t where W is the work done and…

Q: What is the minimum work needed to push a 950 -kgkg car 800 mm up along a 9.5 ∘∘ incline? Ignore…

A: Given: Mass of car m=950 kg Inclination angle θ=9.5° Distance through which car is pushed  S=800…

Q: What is the power output for a 60.0-kg woman who runs up a 3.00 m high flight of stairs in 3.50 s,…

A: The mass of the woman is m=60 kg. The height is h=3 m. The time is t=3.50 s. The final speed is vf=2…

Q: A bag of wheat weight 430 kg. To what height should it be raised so that potential energy is 7790J?…

A: Given data :                 Acceleration  due to gravity    =   g                         Potential…

Q: Calculate the power output needed for a 952-kg car to climb a 2.00° slope at a constant 33 m/s while…

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Q: A weightlifter raises a 150-kg barbell from the floor to a height of 2.2 m in 0.80 s. What is his…

A:

Q: Suppose a 825-kg car can produce a useful power output of 45.5 hp (1 hp = 746 W). How long, in…

A: