A load of mass 200kg is lifted vertically upwards slowly with constant speed, over a displacement of 4m and the complete process occurs in 8s. Neglecting friction and all other losses, determine the power exerted. State the reasons of the answers.

Q: You do 14 J of work to stretch a spring with k = 190 N/m, starting with the spring unstretched. How…

A: Given data: Work (W) = 14 J Spring constant (k) = 190 N/m Initially spring is unstretched Required:…

Q: A 50 kW wind turbine operates at peak efficiency when the wind blows at 26 miles per hour . At this…

A: Given: Power of wind turbine, P=50 kW Wind speed, v=26 miles/hour Betz limit, 62 % To find:…

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 above block was initially compressed by 10cm so that both springs were completely compressed.…

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Q: 8. A B-double truck of mass 45 tonnes is travelling at a uniform velocity of 100 km/h. The driver…

A: Given data:Mass of truck, m = 45 tonnes = 45 x 1000 kg = 45000 kg Initial velocity, u = 100 km/h =…

Q: While hovering, a typical flying insect applies an average force equal to twice its weight during…

A: Mass of insect (m) = 10 g = 0.01 kg weight of insect (w) = m×g = 0.01×9.8= 0.098 N Applied force (F)…

Q: (a) Calculate the energy in kJ used by a 55.0-kg woman who does 50 deep knee bends in which her…

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Q: An advertisement claims that a(n) 1600 kg car can accelerate from rest to 26 m/s in 8.4 s. Given:…

A: Given Mass of the car is given as m=1600 kg Initial speed of the car is vi=0 Final speed of the car…

Q: When an automobile moves with constant speed down a highway, most of the power developeu Dy the the…

A: GIVEN:A car moving down a highway with a speed of 25m/s and has a 205 horsepower engine. 1hp=746W…

Q: A 0.19-kg apple falls from a branch 3.5 mabove the ground. (a) Does the power delivered to the apple…

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Q: Lamar Gant, U.S. powerlifting star, became the first man to deadlift five times his own body weight…

A: the force due to gravity can be expressed as F=mg=300 lb9.8 m/s2=300 lb×0.4536 kg1 lb9.8…

Q: An airplane pilot fell 370 m after jumping from an aircraft without his parachute opening. He landed…

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Q: ASK YOU A 7.80 g bullet is initially moving at 620 m/s just before it penetrates a block of wood to…

A: Given data: Mass of bullet is, m=7.80 g=7.80×10-3 kg. Initial speed of bullet is, u=620 m/s. Depth…

Q: Atmospheric conditions near the Gulf of Mexico are such that a cloud at an altitude of 2.00 km…

A: Data Given ,  Height ( h ) = 2 km = 2 × 103 m Mass ( m ) = 3.20 × 107 kg  Power ( P ) = 2.39 KW =…

Q: The above block was initially compressed by 10cm so that both springs were completely compressed.…

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Q: A 7.80-g bullet moving at 460 m/s penetrates a tree trunk to a depth of 4.90 cm. (a) Use work and…

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Q: A volcanic ash flow is moving across horizontal ground when it encounters a 10 upslope. The front…

A: Consider mass of the ash flow be m, the vertical distance traveled by the flow be h, and the…

Q: For exercise, an athlete lifts a barbell that weighs 400 N from the ground to a height of 2.20 m at…

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Q: A bucket weighing 10 newtons when empty is loaded with 90 newtons of sand and then lifted at 10 cm…

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Q: The wind power is increased by a factor of 8, by doubling the wind velocity. Prove the statement

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Q: Starting from rest, a 1.00 kg crate is accelerated across a floor at a rate of 3.0 m/s^2 for 0.50…

A: Givenmass of crate(m)=1.00 kgacceleration(a)=3.0 m/s2 time(t)=0.50 minutes=30 secondsinitial…

Q: Use energy conservation to find the height at which the speed of the cap is 5.00 m>s.

A: The law conservation of energy says that the total energy of an isolated system remains constant.…

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: 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: A 7.80 g bullet is moving at 460 m/s just before it penetrates a tree trunk to a depth of 4.9 cm (ay…

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Q: Calculate the power output of a 14-mg fly as it walks straight up awindowpane at 2.3 cm>s.

A: The mass of fly, m=14 mg=14×10-6 kg   The velocity, v=2.3 cm/s=2.3×10-2 m/s

Q: What is the ratio of the work done by the engines (engine two to engine one)

A: Answer        Ratio is 2.8 Complete explanation is in next step.

Q: A large roller in the form of a uniform cylinder is pulled by a tractor to compact earth; it has a…

A: Given data: Diameter of roller is, d=180 cm=1.80 m. Weight of roller is, W=10 kN=10×103 N. Initial…