A motor pumps 500 kg of water at a constant speed from street level to a height of 30 m to fill a rooftop tank, and it does so in 10 minutes. What power does the engine develop against gravity

Q: What is the efficiency of a subject on a treadmill who puts out work at the rate of 110 W while…

A: oxygen consumption rate 2 L/m mean power input = 700 Wpower output = 110 W

Q: An elevator must lift 15,000 kg a distance of 125 m at a velocity of 2.5 m/s. What is the average…

A: Mass, m = 15000 kg Distance, d = 125 m  Velocity, v = 2.5 m/s Acceleration due to gravity, g = 9.81…

Q: How much power is developed by an airplane that cruises at 300 m/s when the thrust of its engine is…

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Q: A toy rocket weighing 3 kg holds 4 kg of compressed water as fuel. As the rocket rises it loses…

A: The mass of toy rocket is M=3 kg. The mass of water fuel is m=4 kg. The height at which rocket runs…

Q: our 1500-kg car is behind a truck traveling at 60.0 mph (27.0 m/s). To pass the truck, you speed up…

A: Initial velocity, u = 27.0 m/sFinal velocity, v = 34.0 m/sTime, t = 6 s

Q: 6. A standard baseball has around 146 g. If a ball comes off a bat with 30 W of kinetic energy, how…

A: Note: The unit of kinetic energy mentioned in the question is incorrect, considering the unit of…

Q: An 69 kg Man runs upstairs and reaches 9m height for 13 s. What is his power? Use g=9.8m/s2

A: Power is defined as energy consumed per unit time,  P=Et             (I)…

Q: Your gasoline engine has a limited supply of gasoline, able to do 5000 J of work. If you weigh 800…

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Q: If a water motor fills 25 kg of water in a pool of 60 m in 5 minutes, what is the power of the…

A: The pump fills a pool of height h=60 m with water of mass m=25 kg in t=5 min=300 s.The potential…

Q: A boat weighing m = 2.5 t develops a maximum speed of vmax = 30 m / s. After turning off the engines…

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Q: A 0.32-kg stone is dropped into a water well while being held 1.2 m above the top of the well's rim.…

A: Given Mass of the stone is given as m=0.32 kg Initial height of the stone above the top of the…

Q: A certain rain cloud at an altitude of 1.40 km contains 3.20 107 kg of water vapor. How long would…

A: Altitude of the rain cloud,  Mass of the water vapor,  Power of the pump,  Acceleration due to…

Q: In 45 seconds, a 2.5-ton vehicle can reach 120 mph from rest. Exclude friction losses while…

A: Power is defined as the rate of doing work. It is calculated by dividing work done during a given…

Q: The figure below shows a person pushing a box with a force of 8.2 N over a displacement of 8.7 m.…

A: Given that:- Force(F)=8.2 N    and Displacement(d)=8.7 m Time(t)=5.0 s Work…

Q: A leaky bucket which initially has 20 L of water and leaks at a constant rate is hanging from a 60 m…

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Q: A lawn roller is pushed 15 meters by a force of 100 N. If the person has used 85 W, how long did it…

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Q: You are an athlete who masses 80 kg. When doing a pushup you lift a total of about 56 kg a distance…

A: The gravitational force is, F=mg Here, F is the force, m is the mass and g is the acceleration due…

Q: A water well has a shaft from the water level to the top of the stone wall that is 147. m long. A…

A:

Q: A 43-cm-long vertical spring has one end fixed on the floor. Placing a 2 kg physics textbook on the…

A: It is given that

Q: A 10 cm-long spring is attached to the ceiling. When a 1.7 kg mass is hung from it, the spring…

A: Mass of the object, Natural length of spring  = 10 cm length of spring after stretch = 16 cm

Q: In 45 seconds, a 2.5-ton vehicle can reach 120 mph from rest. Exclude friction losses while…

A: Solution:-Given thattime (t)=45 sInitially at restFinal speed (v)=120 mphmass of vehicle (m)=2.5 ton

Q: Swordfish are capable of stunning output power for short bursts. A 650 kg swordfish has a…

A: Given, Swordfish are moving with speed 30 m/s in sea water and its cross sectional area is 0.92 m2…

Q: The mechanical power of a cyclist pedaling at a constant speed of 7.5 m / s is 152 W. d) what is…

A: Power  P = F.v  Since, F=v(dm/dt)  P = v2(dm/dt)

Q: A 2.5 kg rock is released from rest at the surface of a pond 1.8m deep. As the rock falls, a…

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Q: A person in good physical condition can put out 100 W of useful power for several hours at a…

A: We know that one people produces an output of 100 W so the number of people that can produce 5 kW of…

Q: What is the speed of a rollercoster if it weighs 557 kg and produces 118793 J of thermal energy from…

A: Given,  mass of rollercoaster is m = 557 kg total thermal energy produced is Q = 118793J Point 1-…

Q: A 1400-kgrace car can go from 0 to 100 km/h in 4.8 s . What average power is required to do this?…

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Q: Lli 5 In unloading grain from the hold of a ship, an elevator lifts the grain through a distance of…

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Q: n rain cloud at an altitude of 1.50 km contains 3.20 x 107 kg of water vapor. How long would it take…

A:

Q: A pump is driven by a motor with an output rating of 12 kW (that is, the motor will provide 12 kW of…

A:

Q: We would like to place 300 m long ski lift which moves with a towing speed of 12 km/h, on a steep…

A:

Q: Swordfish are capable of stunning output power for short bursts. A 650 kg swordfish has a…

A: Given data The mass is, m= 650 kg The area is, A=0.92 m2 The drag coefficient is, Cd=0.0091 The…

Q: A student weighs 150 lbs and walks up a set of stairs from the first floor to the second floor of…

A: mass (m) = 150 lb time (t) = 20 second

Q: The famous cliff divers of Acapulco leap from a perch 35 m above the ocean. How fast are they moving…

A: Details Given: Height of cliff = 35m The velocity of cliff divers is calculated from the formula of…

Q: A 1200 kg car can accelerate from 30 m/s to 50 m/s in 10 s. Neglecting friction, and air resistance,…

A: