A tower crane has a hoist motor rated at  167 hp. If the crane is limited to using  65.0 % of its maximum hoisting power for safety reasons, what is the shortest time in which the crane can lift a    5750 kg load over a distance of 83.0 m? Assume the load is lifted at a constant velocity. ( 1 hp = 746 W)

Q: An engine is being used to raise a 89.0 kg crate vertically upward. If the power output of the…

A: Given: mass of crate, m = 89 kg power output of the engine, P = 1620 W vertical distance, h = 18.7 m

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

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Q: A student weighing 551 N climbs at constant speed to the top of an 14 m vertical rope in 17 s. What…

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Q: A horse can provide sufficient power to pull a wagon with a 200 N force at a steady 3.0 m/s. Suppose…

A: Given data: Force (F1) = 200 N Velocity (v1) = 3.0 m/s New force (F2) = 300 N Required: Speed of the…

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: A weighlifter lifts a 50-kg barbell a vertical height of 2.0 m in 5.0 s. What is the average power…

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Q: 3An elevator lifts a load of mass 10 kg a distance of 50m in 14 s. Find the work done and the power…

A: Given Data : The mass that the elevator lifts is given as m = 10 Kg. The height by which the load is…

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: 9 A box moves on a frictionless horizontal surface under the influence of the two forces = F₁ = (50î…

A: Power = It is the dot product of force vector to the velocity vector.

Q: A man manages to ride a bicycle (total mass 95 kg), 10 m/s from rest, up a hill 230 m high against…

A: Given:mass,m=95 kghigh,∆h=230 mspeed,v=10 m/sdistace,d=1500 mTime,t=6 minute=360 sec.Now,Total work…

Q: A certain automobile having mass 1000 kg climbs an inclined road with a constant 32 m/s speed. If…

A: Mass of the car is m = 1000 kg velocity of the car is is v = 32 m/s Angle of inclination of the road…

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: A 450 kg dragster accelerates from rest to a final speed of 120 m/s in 400 m (about a quarter of a…

A: mass of dragster = 450 kg Initial velocity = 0 m/s final velocity = 120 m/s distance moved = 400 m…

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

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Q: A fully loaded, slow-moving freight elevator has a cab with a total mass of 1600 kg, which is…

A: Given:-         Total mass  M=1600 kg        Distance to cover  d=39 m        Time taken  t=2.2…

Q: A horse can provide sufficient power to pull a wagon with a 250 N force at a steady 3.0 m/s. Suppose…

A: Given data: Force of pulling first wagon (F1) = 250 N Velocity of first wagon (V1) = 3.0 m/s Force…

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

A:

Q: A 40.0 kg jogger runs up the slope described in the fiqure. She maintains a constant speed of 4.00…

A: Given  Mass of jogger(m) = 40Kg Speed (s) = 4m/s

Q: A horse is pulling a sled at a velocity of 3.5 m/s. If the horse's power output is 250 W, what is…

A: Given data:  Velocity (v) = 3.5 m/s Power (P) = 250 W Required: Force (F)

Q: I have a motor that is rated for 6000 W. What is the maximum amount of work that the motor can do in…

A: Given data The power of the motor is P = 6000 W The time taken to work is t = 10 s The mass of the…

Q: A 710 kg car is moving on level ground at a constant speed of 23 m/s. It is subject to a drag force…

A: Given data:  Force (F) = 500 N Speed (v) = 23 m/s Required: The power (P)

Q: How much time is required for a elevator to lift a 2000 kg load up 28 m from the ground level, if…

A: Given data: Mass m = 2000 kg Distance from ground level d = 28 m Power P = 13 kW

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

A: Given: mass of top fuel dragster, m = 600 kg Initial speed, u = 0 (starting from the rest) Final…

Q: Water flows over a section of Niagara Falls at a rate of 1.4 × 106 kg/s and falls 60 m. What is the…

A: Given: The rate of mass of the water=dmdt=1.4×106 kg/s. The height of the fall=h=60 m Acceleration…

Q: The box has a mass of 50 kg and is at rest. When it is pulled with 1000 N it reaches speed of 5m/s.…

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Q: A car of mass 920.0 kg accelerates away from an intersection on a horizontal road. When the car…

A: mass of car (m) = 920 kg speed (v) = 12.4 msNet power (P) = 5300 W

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

A:

Q: Calculate the power output needed for a 989.00 kg car to climb a 2.00° slope at a constant 45.00 m/s…

A: Given, Mass of  car m = 989 Kg Slope θ =2∘   Speed v = 45 m/s friction f = 749  N   We know the…

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 car's engine generates 80000 W of power as it exerts a force of 6000 N. How long does it take the…

A: Given, Power generates engine of the car, P = 80000 Wforcec exerted by engine, F = 6000 Ndistance…

Q: A particle, mass 8 kg, moves along the y axis with a speed of 3.3 m/s. It experiences a force of 16…

A:

Q: 19. If a ski lift raises 100 passengers averaging 660 N in weight to a height of 150 m in 60.0 s, at…

A: average weight of a passenger= 660 N Total weight lifted= 100×660= 66000 N Height H= 150 m time…

Q: A object 2 kg is moving in one dimension with a velocity given by  V(t)= 1 / 2 t^2  at t=4 s.…

A:

Q: A car's engine generates 80000 W of power as it exerts a force of 6000 N. How long does it take the…

A: Given: The power of the engine is 80000 W. The force exerted by the engine is 6000 N. The…

Q: How much power is required to raise a 30-kg crate a vertical distance of 6m in a time of 4 seconds?…

A: Given, Mass=30kg Distance=6m Time=4sec

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: 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: 3 An elevator lifts a load of mass 10 kg a distance of 50 m in 14 s. Find the work done and the…

A: Given Data : The mass lifter by the elevator is given as m = 10 Kg. The distance by which the mass…

Q: A crane lifts a 268 kg crate a height of 12.4 m in a time of 80.0 s at a constant speed. What is the…

A: Given data:  Mass (m) = 268 kg Height (h) = 12.4 m Time (t) = 80.0 s Required: The power (P)

Q: 12. A person runs up a long flight of stairs in 10 seconds. If the person’s weight is 600 N and the…

A: Given data The time taken by the person is t = 10 s. The person weight is W = 600 N. The vertical…

Q: What average mechanical power (in W) must a 70.5 kg mountain climber generate to climb to the summit…

A: The expression for the average mechanical power (P) is,

Q: What average mechanical power (W) must a 76.5kg mountain climber generate to climb to the summit of…

A: Given that: m=76.5 kgg=9.8 m/s2h=405 mt=46 min=2760 sec W=?

Q: What power is needed to move a 13.4 kN car up an 8 degree incline with a constant speed of 80 kph…

A: Given: Mass of car, m = 13.4 kN = 1366.42 kg Angle = 8 degree Speed, v = 80 kph = 80 X 5/18 = 22.22…

Q: A woman uses a pulley and a rope to raise a 20 kg weight to a height of 2 m. If it takes 4 s to do…

A: mass, m = 20 kg  height, h = 2 m  time, t = 4s  The formula for energy is  E = m g h  The power is…

Q: What minimum horsepower must a motor have to be able to drag a 450 kg box along a level floor at a…

A: