A manufacturer uses an elevator to move items from one level to another. The elevator has a mass of 700 kg and moves upward with constant acceleration for 3.00 s until it reaches its cruising speed of 1.75 m/s. (Note: 1 hp = 746 W.) (a)What is the average power (in hp) of the elevator motor during this time interval? (b)What is the motor power (in hp) when the elevator moves at its cruising speed? (c)What If? If the elevator motor can only deliver constant power at one setting, the amount needed for its motion at constant speed, how long (in s) will it take the elevator to accelerate to the cruising speed of 1.75 m/s? (If you need to use or –, enter INFINITY or –INFINITY, respectively.)

Q: ohn, of mass 82.4 kg can do work for about 2.0 minutes at the rate of 1.0 hp. How long will it take…

A: Given data: Mass (m) = 82.4 kg Power (P) = 1.0 hp Height (h) = 12.0 m 1 hp = 746 watts Required:…

Q: A child pulls on a wagon with a horizontal force of 75N. If the wagon moves horizontally a total of…

A:

Q: A 67 kg yak has an average power output of 200 W. How long can a yak climb a 3km high mountain?…

A:

Q: A truck with a loaded mass of 12 tons is moving on a 4% graded highway section with a velocity of 30…

A: Slope =4100=125 = tanθ velocity =30km/h = 8.33 m/s F-mg sinθ -friction -air resistance=0 Power =…

Q: How much power is required to lift a heavy solid concrete beam with mass 91.22 kg upward with a…

A: Given Mass =91.22 kg speed v =3.8 m/s

Q: What average power does a 1,565 kg car need to go from 0 to 12.6 m/s in 6.86 seconds? Assume a…

A:

Q: A man pushing a crate of mass m = 92.0 kg at a speed of v = 0.850 m/s encounters a rough horizontal…

A:

Q: In scaling a vertical wall, spiderman needs 3.1 kW of power to maintain a speed of 4.5 m/s. If…

A:

Q: A- A 0.750 x 10**3 kg elevator car carries a maximum load of 7.500 x 10**2 kg. A constant frictional…

A: Given data: Mass of elevator (M) = 0.75*103 kg Mass of maximum (m) = 7.5*102 kg Frictional force (F)…

Q: A tower crane has a hoist motor rated at  167 hp . If the crane is limited to using  66.0%  of its…

A:

Q: What average power would a 1500 kg speedboat need to go from rest to 25 m/s in 6 seconds if the…

A:

Q: Suppose that as part of their training, the football players of MSU went up a stair in 66 s. The…

A:

Q: A cheetah can accelerate from rest to 6.4 m/s (about 16 m/h) in 1.2 seconds. How much average power…

A:

Q: What average power is needed to lift a 65-kg vendor vertically upward at a uniform speed of 0.44…

A:

Q: What average mechanical power (in W) must a 61.5 kg mountain climber generate to climb to the summit…

A: The mechanical power of the climber can be found as, Here, W and t represent the work-done and…

Q: A 135g Frisbee is thrown from a point 1.05 m above the ground with a speed of 12.00 m/s. When it has…

A: Given m=135g H1=1.05m H2=2.50m V1=12.00m/s V2=10.4831m/s   Work done on the Frisbee can be defined…

Q: How much power is required to lift a heavy solid concrete beam with mass 60.21 kg upward with a…

A:

Q: The elevator with a mass of 200 kg with an input power of 4.5 kW with a constant speed, takes 2…

A: The elevator has a mass of 200 kg. Let M=200 kg. The elevator carries 2 persons, 50 kg each, from…

Q: particle of mass m=1.1 kg can move along the horizontal x axis subject to a single force that is…

A:

Q: A man has an average useful power output of 80.0 W. If he is asked to lift a box of 8.0 kg to a…

A: Given: Power P = 80.0 W Mass m = 8 kg Height h = 20 m To determine; Time t Formula used: ∆U = mgh P…

Q: A little red wagon with mass 7.00 kg moves in a straight line on a frictionless horizontal surface.…

A:

Q: A warehouse worker uses a forklift to raise a crate of pickles on a platform to a height 3.75 m…

A:

Q: A cord is used to vertically lower an initially stationary block of mass M = 8.7 kg at a constant…

A:

Q: 17.25) Compute the power required to overcome drag on a  truck with a drag coefficient of 0.75 when…

A: Given DataCd=0.75V=65kmph=18.056m/sT=40°Cw=8fth=12ftA=8×12=96ft2

Q: You drag your 30 kg suitcase 1200 m thru the Chicago airport at essentially constant velocity 2.0…

A: Given: Mass, M = 30kg Distance , s= 1200m Velocity, v = 2.0m/s Force, F = 90N, 20o westward

Q: An advertisement claims that a 1000 kg car can accelerate from rest to a speed of 20 m/s in a time…

A: mass = 1000kg v1= 0m/s;    v2=20m/s t= 5sec. K.E1= 0  (car starts from rest) K.E2= (1/2)* 1000*…

Q: How much work must you do to push a 13 kgkg block of steel across a steel table at a steady speed of…

A: Given: The mass of the block is 13 kg. The constant speed of the object is 1.3 m/s. The coefficient…

Q: A 1.00 x 10*3 kg elevator car carries a maximum load of 8.00 x 10*2 kg. A constant frictional force…

A:

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: A 26 kg object is acted on by a conservative force given by F = (-2.9)x + (-5.9)x2, with F in…

A:

Q: A cheetah can accelerate from rest to 7.4 m/s (about 17 m/h) in 1.1 seconds. How much average power…

A: The correct choice of answer is option (a) i.e. 1300 W

Q: Q.2 A 1.00 x 10*3 kg elevator car carries a maximum load of 8.00 x 10*2 kg. A constant frictional…

A:

Q: A pump lifts water at the rate of 6 m^3/s to a height of 120 m and the friction loss in the pipe is…

A:

Q: What minimum horsepower must a motor have to be able to drag a 380 kg box along a level floor at a…

A: The frictional force acting between box and floor is, F=μmg             (I)…

Q: A 55-kg marathon runner runs up the stairs to the top of Taguig’s 318-m Grand Hyatt Manila, the…

A: Mass of the runner M=55 kg The height reached h=318 m The time taken t=20 minutes=20×60 s=1200 s…

Q: The aircraft carrier USS George Washington has mass 1.0 ×108kg. When its engines are developing…

A: Let Pout be the total power output of the engines, P is the power used to push the ship through the…

Q: When its 75-kW (100-hp) engine is generating full power, a small single engine airplane with mass…

A:

Q: 50.0kg marathon runner runs up the stairs to the top of a 443m tall tower. To lift herself to the…

A:

Q: Q.2 A- A 0.750 x 10**3 kg elevator car carries a maximum load of 7.500 x 10**2 kg. A constant…

A:

Q: What average mechanical power (in W) must a 60.0 kg mountain climber generate to climb to the summit…

A: solution as

Q: Suppose the ski patrol lowers a rescue sled carrying an injured skiier, with a combined mass of 92.5…

A: Work done on an object by a force F is given as- W=F.d=Fd cosθ where,d is the displacemnt of objectθ…

Q: What is the power output for a 60.0-kg woman who runs up a 3.00 m high flight of stairs in 3.50 s,…

A: The mass of the woman is m=60 kg. The height is h=3 m. The time is t=3.50 s. The final speed is vf=2…

Q: The power delivered by a constant  force is given by P=F⃗·v⃗,  The power exerted by gravity as it…

A: The power delivered by the force is given by,

Q: Hk=0.38. If the speed of the block v=7m/s when it leaves the inclined plane, determine the work done…

A: Given data: The mass of block is m=1.64 kg. Coefficient of friction is μk=0.38. Velocity of block…

Q: The figure shows a plot of potential energy U versus position x of a 0.260 kg particle that can…

A: Since we are entitled to answer up to 3 sub-parts, we’ll answer the first 3 as you have not…

Q: What is the power output for a 60.0 kg person who runs up a 3.00 m high flight of stairs in 3.50 s,…

A: