Find the power demand on the motor assuming the 300-kg crate is being pulled at a constant velocity of 5 m/s. Also determine the power input with the motor having a running efficiency of 0.7.

Q: A 20kg block is sliding down a 37-degree ramp at a constant speed for 15m. Calculate the work done…

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Q: Calculate the blade length of a wind turbine rotor which produces a maximum power of 6 MW at a wind…

A: Given : Power (P) = 6 MW = 6 x 106 W Speed (v) = 41 km/hr = 11.39 m/s Air density (ρ) = 1.23 Kg/m3…

Q: You’re using a system of multiple simple machines to move a 1500 N load up a height of 2 meters. You…

A: Mechanical advantage The mechanical advantage of a ramp or an inclined plane is the defined by the…

Q: a winch pulls the truck against 500N of friction and does 3000 joules of work how far did the winch…

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Q: Calculate the electric power produced per square meter of windmill disk area for a windmill…

A: Given, Maximum power coefficient, Cp=0.90×0.70×0.59Cp=0.3717 Air density at sea level at 15°C,…

Q: 10-kg block is dragged along an inclined plane (Ø= 300) with a constant speed of 2 m/s. If F is the…

A: M= 10kg  Angle is 30°  Speed(v) = 2m/s  Applied force is F  Coefficient of friction (u) = 0.25

Q: ) A crane used to lift a 975 kg bucket of concrete operates at an efficiency of 29.8%. If the…

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Q: 4. A 1,380kg sports car accelerates from zero to 35 m/s in 8.0 s. Assume in accelerates at a…

A: Average power is given by   Instantaneous power is given by P = F × V Where  F = Force applied on…

Q: Compute the kinetic energy of 1200kg automobile traveling at 20km/hr.

A: Given, Mass of automobile,m=1200 kg Speed, v=20 km/h=5.5 m/s

Q: SHOW THE RAW AND THE ROUNDED OFF VALUE OF YOUR FINAL ANSWER. The speed of the riders of the roller…

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Q: What is the cost of operating a 3.00-W electric clock for a year if the cost of electricity is…

A: The number of hours for which the clock is operated can be obtained as 1 year=1year×365 days1year×24…

Q: Take the ground as the zero of potential energy. (a) Find the total mechanical energy of a 45.9…

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Q: In the figure, the vehicle has a mass of 2000 kg, and is traveling at a speed of v = 50 m/s. If the…

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Q: A system having a mass of 50 kg is raised to a height of 50 m. If the system is raised to its final…

A: mass (m) = 50 kg height (h) = 50 m time taken (t) = 2 minutes = 120 seconds

Q: A large household air conditioner may consume 15.0 kW of power. What is the cost of operating this…

A: The total time in hours for which the air conditioner operates is

Q: A large household air conditioner may consume 14.0 kW of power. What is the cost of operating this…

A: Unit of power=KiloWatt=KW Unit of Time=hour Power=Energy/time Energy=Power X time Unit of energy is…

Q: (a) What is the efficiency of an out-of-condition professor who does 1.90 X 105 J of useful work…

A: The given quantities areEo=1.9∗105JEi=510kCalη=0.2We will use value of the efficiency 0.2 (20%) for…

Q: Given : C 375 N block (C) is a hoisted by the pully system and motor M. The motor has an efficiency…

A: Given : C 375 N block (C) is a hoisted by the pully system and motor M. The motor has an efficiency…

Q: 3. An electric motor used to lift an elevator has power rating of 26.74 kW. If it can carry a…

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Q: 6. At the instant shown, point P on the cable has a velocity Vp = 12 m/s, which is increasing at a…

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Q: energy per minute. Find the power supplied by the engine in kilowatt. ple 8 An engine supplies 6000…

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Q: car (m = 660.0 kg) accelerates uniformly from rest up an inclined road which rises uniformly, to a…

A: Given Mass of the car is m=660.0 kg Height of the hill is h=39.0 m Final speed of the car is vf=24.9…

Q: Given: The energy equivalent of one gallon of gasoline is 1.3 x 10° J. A compact car has a mass of…

A: Given: The energy equivalent of one gallon of gasoline is Ee,gasoline=1.3×108 J/gal, The mass of…

Q: When using an inclined plane with an angle Θ from horizontal as a machine to lift an object, and…

A: Given, angle of inclination = θ             coefficient of friction = μ

Q: A 60.5 kg mass is to be lifted 1.20 meters using a ramp that makes an angle of 9.75 degrees with the…

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Q: Calculate the blade length of a wind turbine rotor which produces a maximum power of 4 MW at a wind…

A: SOlution: Given that max power, P = 4 MW wind speed v = 46 km/hr wind speed v = 12.7 m/s air density…

Q: An electric motor is rated at 10 horsepower (HP) and costs $800. Its full-load efficiency is…

A: Given: Full load efficiency is 85 % Efficiency of high-efficiency motor can be 90%

Q: A car of mass 1580kg traveling at 22m/s is at the foot of a hill that rises 110m in 3km. At the top…

A: Average Power is defined as the work done during a time interval, divided by the time interval,…

Q: In figure (5), if the 50 kg load A is hoisted by motor M so that the load has a constant velocity of…

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Q: A 10-kg block is dragged along an inclined plane (Ø= 300) with a constant speed of 2 m/s. If F is…

A: Given that,Mass of block : m = 10kg   Angle: θ = 30°   Speed: v = 2 (m/s) Coefficient of friction μf…

Q: final velocity

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Q: student pushed a box 11.0 m across a smooth horizontal floor using a constant force of 270 N if the…

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Q: An inclined plane at an angle of 15o is used to lift a 250 kg sofa through a vertical height of 5…

A: Draw the free-body diagram of the sofa: