An elevator weighing 3000N ascends at a constant speed of 8.omis. How much power must the motor power supply to do this?

Q: Sam, whose mass is 68 kgkg , straps on his skis and starts down a 58 mm -high, 20∘20∘ frictionless…

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Q: A man of mass 60 kg runs up a flight of 30 steps in 40 s. If each step is 20 cm high, calculate his…

A: Step 1   ∙Mass of man m=60kg   ∙Flight 30 steps in 40sec.   ∙Each step is 20cm high.

Q: How much power is needed to uniformly accelerate a 1000-kg test car from 30 kph to 70 kph as it…

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Q: A 261 kg ball from a demolition machine is propelled sideways until it is 4.83 m above its lowest…

A: Given : Mass of a ball (m) = 261 kg Height (h) = 4.83 m

Q: LA force of 40N is applied to a body to move it at a uniform velocity through a distance of 15m in…

A: Exercise (1): Given: The applied force is 40 N. The displacement of the object is 15 m. The time…

Q: Calculate the kinetic energy in Joule, of a car of mass 1800kg travelling at 40km/h.

A: Recall KE=1/2mv^2 m=1800kg v=40km/hr=11.11m/s

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: How many watts of power do you expend when you exert a force of 1N that moves a book 2m in a time…

A: The power exerted on the book is

Q: A construction worker, 24 feet up ona scaffold, lifts a 4-Ib rope h over hand up to the scaffold to…

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Q: A 650 kg dragster accelerates from rest to a final speed of 110 m/s in 400 m (about a quarter of a…

A: Given, vf= 110 ms, d=400 m, fk=1200 N, vf= 0 ms, t=7.30 s…

Q: An electric motor raises an elevator weighing 1.20 x N a distance of 9 m in 15 s. What is the power…

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Q: m above

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Q: A 2000kg car accelerates to 20 m/s.  If the car can do this in 10 seconds, what was the average…

A: Given: Mass of car (m) = 2000 kg Final velocity of car (v) = 20 m/s Time taken to achieve final…

Q: Choose the BEST answer to the following: The power required to raise a 100-kg crate a vertical…

A: Given:Mass=100kgvertical distance =2mTime=4s

Q: show the complete solution A man exerts a 130 N force in pushing a wheelbarrow loaded with garden…

A: solution as

Q: An elevator weighing 2500 N ascends at a constant speed of 8.0 m/s. How much power must the motor…

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Q: How much work, in Newton meter, is done in pulling a rider on a wagon ot a constant velocity and a…

A: Given, Force F = 100N            Displacement S = 50m            Angle θ = 400

Q: You push a table through 3m with a force of 30N. How much work have you doneon the table? The table…

A: The expression for work done is, W=F×d       (I)              F=force,d=displacement

Q: A top fuel dragster with a mass of 600.0 kg starts from rest and completes a quarter mile (402 m)…

A: Given data- A top fuel dragster with a mass m=600.0 kg initial velocity Vi=0 m/s (rest) final…

Q: In transporting a patient on a wheelchair up an inclined ramp at an angle of 20° with the horizontal…

A: Force , F = 1400 N Angle , θ=  20° Velocity , V = 2.5 m/s To find = Power produced

Q: A 1000-kg car travels with the horizontal at 20 m/s. Find the cruising kilowatt power required,…

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Q: In a common test for cardiac function (the “stress test”), the patient walks on an inclined…

A: Given data: The mass of the patient, m=75 kg. The angle of inclination of the slope, θ=12°. The…

Q: An engine develops 55 kw of power. How much time does it take to lift 550 kg to a height of 40 m.

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Q: A crane operating with power of 1225 W needs to lift a 500 kg mass to height of 30 m. About how ong…

A: Given:- mass of the object m= 500 kg  height h = 30 m  The power P =1225 W  Find:- how long will it…

Q: 2.5 kg dictionary from the floor onto a shelf 1.9 How much work (in Joules) is done in lifting:a m…

A: The work done in joules can be calculated in given steps:Given:

Q: power

A: Given: Mass of the dragster = 650 Kg initial speed = 0 final speed = 110 m/s Distance= 400 m…

Q: You (50 kg) wanted to climb a slope (50) with a speed of 15 m/s. How much power do you need? Assume…

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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 donkey is pulling a sled at a velocity of 3.5 m/s. If the donkey's power output is 890 W, what is…

A: Given value--- velocity = 3.5 m/s. power = 890 W. We have to find--- Force?

Q: A compact car can climb a hill in 10s. The top of the hill is 30m higher than the bottom, and the…

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Q: A vehicle weighing 1200 kg can reach 90 km / h from a standstill in 8 seconds. Are the amount of…

A: Given: Mass of the vehicle, m =  1200 kg. Initial velocity of the vehicle, u = 0. Final velocity of…

Q: How fast can a motor lift a 20kg object to 10m if the power produced ia 1000W?

A: POWER = F.V   F= m g h  = 20 x10 x 10 = 2000 N P= 1000W M=20 Kg

Q: A 210.0 lb hiker is able to ascend a 1,100.0 ft high slope in 30 minutes. What was the average power…

A: The given data are listed below with appropriate variables. Here, W denotes the weight, h denotes…

Q: A man of mass 60.0 kg takes 4 seconds to run up a 4-m high stairs. Which of the following gives the…

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Q: An escalator is bringing people to the second floor of a building that is 20m up. Assuming the…

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Q: An elevator that masses 800 kg rises at a rate of 2 m/s for 10 seconds. How much power does the…

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Q: A 715-N Marine in basic training climbs a 10.5-m vertical rope at a constant speed in 6.00 s. What…

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Q: 450 kg racecar can go from 0 to 60 km/h in 10.0 s. What is the average 6. power is required to do…

A: Dear student The change in potential energy between two horizontal levels is defined as : ∆U = mgh…

Q: You're riding a toboggan down an icy run to a frozen lake, and you accelerate the 80.0-kg…

A: Given : m=80kg u=1m/s v=2m/s t=2s

Q: A 685-N Marine in basic training climbs a 8.0-m vertical rope at a constant speed in 8.50 s. What is…

A: Weight, W = 685 N Height, h = 8 m  Time, t = 8.50 s   Power, P = Work/Time or P = Wh/t or P = 685 x…

Q: A biker and bicycle together weigh 80 kg. What power does the biker output when riding up a 9% grade…

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Q: A crane lifts a load of 6000 N through a vertical distance of 15 m in 30 s.What is the average…

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Q: An automobile has a power output of 100 hp. When it pulls a cart with a force of 300N. What is the…

A: Given- Power P= 100 hp=74600 W Force F= 300N

Q: Your car produces about 33kW of power to maintain a constant speed of 35 m/s on the highway. What…

A: Give that power P = 33kWThe speed v = 35m/s

Q: How múch work did the movers do (horizontally) pushing a 47.0-kg crate 10.6 m across a rough floor…

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