A skier of mass 80 kg is pulled up a slope by a motor-driven cable. (a) How much work is required to pull him 55 m up a 30° slope (assumed frictionless) at a constant speed of 1.8 m/s?   (b) What power (expressed in hp) must a motor have to perform this task?

Q: A carton is pulled along the ground for a distance of 11 m. If the average frictional force is 57 N,…

A: Work done is defined as  W=F→·S→where F is the force S is the displacement Here the Frictional force…

Q: A helicopter lifts a 100kg crate straight up via cable, with an acceleration of 0.8m/s?. If the…

A: mass of crate = 100 kg acceleration = 0.8 m/s2distance = 5 m

Q: How much work does it take to slide a crate 10 m along a horizontal loading dock by pulling it with…

A: Given that the  distance and angle and also given the force. Then We have to determine the work…

Q: If it takes 4.00 J of work to stretch a Hooke's-law spring 5.0 cm from its unstressed length,…

A: The work done is given by  W = 12Kx2 where,  K is the spring constant and x is the stretch length.

Q: Suppose 65 passengers with an average mass of 75kg are transported by a ski lift to a height of…

A: Given: The number of passengers: n = 65. The average mass of a passenger: m = 75 kg. The height…

Q: If 12 J of work are needed to stretch a spring from 16 cm to 20 cm and 20 J are needed to stretch it…

A: Given data The work done required to stretch the spring from 16 cm to 20 cm is given as W1 = 12 J.…

Q: How much work is required to move an object from x = 0 to x = 5 (measured in meters) in the presence…

A:

Q: A person pulls a 10 kg luggage along a level road for 5 m by exerting a force of 20 N at an angle of…

A: Given Data : Mass of luggage, m= 10 Kg                      Force= 20N                      Vertical…

Q: A single force acts on a 3.0 kg particle object whose position is given by x= 3.0t-4.0t^2+.5t^3,…

A: The mass of the particle m=3.0 kg The position of the particle x=3.0t-4.0t2+.5t3 The velocity of the…

Q: A 1.5 kg object slides across a horizontal surface with an initial speed of 6.84 m/s. If the object…

A:

Q: An archer pulls a bowstring back 0.500 m by exerting a force that increases uniformly from zero to…

A: It is given that, x=0.500 mF=250 N

Q: If A 29-kg child starts from rest and slides down a slide that is 2.6 m high. At the bottom of the…

A: Given parameters :  Mass "m"= 29kg  Height "h"= 2.6m  Final Velocity "v"= 2.5m/s .   Concept :…

Q: how much work did the movers do (horizontally) pushing a 46.0-kg crate 10.3 m across a rough floor…

A: The expression for the required work done is,

Q: A box of canned goods, contents have a total mass of 4.5 kg, is pushed 2 m along the floor by a…

A:

Q: When the velocity of an object with mass 0.57 kg changes from 1.16 m/s to 0.32 m/s by the force F,…

A:

Q: A big man is towing a large box with a cord that makes an angle of 25 degreeswith the horizontal.The…

A: Force applied on box = 100 N displacement of box = 2 meter angle between force and displacement…

Q: Calculate the total work done on a 1550-kg car as it coasts 20.4 m down a hill with f = 5.00°. Let…

A: Let m be the mas of the car, s is the distance traveled down the hill, and θ is the inclination…

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 2 kg object slides across a horizontal surface with an initial speed of 6.53 m/s. If the object…

A: Given- Mass of object m= 2kg Initial velocity v=6.53 m/s

Q: Why is it tiring to push hard against a solid wall even if no work is done? A 75 kg firefighter…

A: Q 1) We get tired because we use our energy to contract the muscles. We try to push the wall using…

Q: What would be the power output in hp of a 1750 kg car if it can ascend to the top of a 285 m high…

A: Take the bottom of the hill to be at height zero. The potential energy of the car at the bottom of…

Q: The force on a particle is directed along an x axis and given by F = F0(x/x0 - 1) where x is in…

A: The force on a particle directed along x axis is given by,

Q: A force of 40 Newtons is applied to an object at an angle of 37 degrees from the horizon, displacing…

A:

Q: A block of mass 3.57 kg is drawn at constant speed a distance 4.06 meters along a horizontal floor…

A: Analyze the diagram of the given system.

Q: Find the work done in joules by gravity as an object of the mass m310 kg is raised up at constant…

A: Mass = 10 kg  Displacement = h2 - h 1 = 80m - 22 m =  58 m As we know Workdone  is given by W  Which…

Q: How much work did the movers do (horizontally) pushing a 46.0-kg crate 10.3 m across a rough floor…

A:

Q: How much work is done by gravity in causing a 45-kg rock to tumble 54 m down a slope at an angle of…

A: mass of the rock, m = 45 kg distance that rock travels, d = 54 m angle of slope with vertical,= 48…

Q: A record was set for stair climbing when a man ran up the 2300 steps of the Empire State Building in…

A: Average power output is,

Q: The force needed to stretch a spring by x meters is given by F(x) = 3.6x Newtons. How much work is…

A:

Q: If you carry a bag of groceries weighing 115 N from your car to your kitchen, a distance of 44 m,…

A: Given data, Force on bag weighing = 115N Distance to be travelled = 44m We know that, Work done =…

Q: A truck weighing 3.0 x 10^4 newtons was driven up a hill that is 1.6 x 10^3 meters long to anarea…

A: Weight of the truck  W = 3×104 N The weight is a measure of the force of gravity acting on the…

Q: A truck has a gross weight of 1.0 x 106 N. Assuming that the concrete road has a coefficient of…

A:

Q: Suppose it takes a force of 42 N to hold a spring that has been stretched from its natural length of…

A: Given : Force to stretch the spring from 15 cm to 18 cm, F1 = 42 N Elongation in this case, x1 = 18…

Q: f the hand does 40 J of work on the 2.5 kg cart, how fast will it travel? If the person does 480…

A: Since you have posted a question with a multiple sub parts, we will solve first three sub - parts…

Q: Pushing a heavy box of 100 N up along a frictionless slope, the speed decreases at a rate of 1 m/s?.…

A:

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: A person holds a bundle of hay over his head for 30 minutes and gets tired. Has he done some work or…

A: Work is done whenever the given two conditions are satisfied: a force acts on the body. there is a…

Q: A person pulls a 10 kg luggage along a level road for 5 m by exerting a force of 20 N at an angle of…

A:

Q: Suppose that 2 J of work is needed to stretch a spring from its natural length of 32 cm to a length…

A: The original length of the spring,