system of four pulleys, two in a block is used to raise a weight of 800 pounds by a force of 200 lbs. The efficiency of the system is 80%. Draw the simple machine set

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: When the mechanical energy decreases , the work negative True or false

A: Mechanical energy E is the sum of Kinetic energy and Potential energy of an object E = KE +PE When…

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

A:

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: Efficiency

A: the values provided in the question are as follows- effort = 750n load = 4000 n no. of pulleys = 3…

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Q: se 3: Class - Da Paco rode his skateboard up a ramp for a distance of 3.8 meters. If the ideal…

A: The first question is asking for the height above the ground that Paco reached when he rode his…

Q: Section B Answer ANY THREE questions in this section. Each question carries 2 BI.ra) A pully system…

A:

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…

A:

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: Storage tan 25 m Pump

A:

Q: 3. A hockey puck of mass 0.25 kg starts from rest and slides down the frictionless ramp shown in…

A: Given that,Mass of the hockey puck, m=0.25 kgHeight of the ramp, H=8.0 mHeight of the bottom end of…

Q: What is the efficiency of a subject on a treadmill who puts out work at the rate of 106 W while…

A: It is given that power input ≡oxygen consumption of 2L/m ≡700W power output = 106 W

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: Energy spent by machine.

A: Given;  A machine raises a load;  F= 700 N Height,h= 18 mTime ,t= 5 sCalculate;  1. Energy spent by…

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: A power output of 18.0 h.p. is required to overcome friction and move a certain car at a constant…

A: The power required to move a body at a certain velocity is given by P = F×v, where F = the force…

Q: allison exerts a force of 186 N on a lever to raise a 2.70 x 10^3 N object to a height of 29.0 cm.…

A: Given Effort = E = 186 N Load = L = 2.70 × 103 N = 2700 N Rise of object height = ho = 29.0 cm…

Q: A man exerts a force of 50 N to push a 150 N box up a plane 4.0 m long on to a platform 1.0 m above…

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Q: A 83kg person climbs a 6.2m ladder in 14s. What is the power out put for this process

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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: A hoist is to raise a 11147.727 N mine cage at the rate of 4.57 m/s. Mechanical efficiency of 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: Flying with a speed of VV∞ = 120 m/s at an altitude of 2000 m, where the density is 1.007 kg/m3, the…

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Q: A man of mass 75kg runs up a flight of 50 steps in 15 seconds. Calculate the power output, when this…

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Q: A hydro electric power station takes its water from a lake whose water level is 50m above the…

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Q: When a cyclist expends 1500 W of power to deliver mechanical energy to her bicycle at a rate of 100…

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Q: Water is lifted out of a well 20.0 mm deep by a motor rated at 1.10 hp. Assuming efficiency 85 % ,…

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Q: What is the power output for a 60.0-kg woman who runs up a 2.48 m high flight of stairs in 3.84 s,…

A: The mass of the woman is 60 kg.The height achieved by the woman is 2.48 m.The time interval is 3.84…