Shoveling snow can be extremely taxing since the arms have such a low efficiency in this activity. Suppose a person shoveling a footpath metabolizes food at the rate of 750 W. (The efficiency of a person shoveling is 3%.)

Q: In a time t=17.00 s, a 66.0-kg student runs at a steady pace up two flights of stairs whose combined…

A:

Q: problem 1 Compute the kinetic energy, in Joules, of a 1,600-kg automobile traveling at 50 kph.

A: Since you have posted multiple questions we will solve the first question for you. If you want any…

Q: Atruk has an engine power of 50 kN, what the power that makes the truck speed 80 km? O 2.11 Mw 1.21…

A:

Q: A weight lifter lifts a 350-N set of weights from ground levelto a position over his head, a…

A: When the weightlifter lifts the weight with a constant velocity, the net force on the weights will…

Q: If a person of mass 100.0kg climbs a 2.00m high set of stairs in 4.00s, how much work do they do?

A: Given data: The mass of person is m=100 kg. Height of stairs is h=2.00 m. Time taken is t=4.00 s.

Q: .How much work is done in lifting a 2-kg ball 0.5m high? Express your answer in a) joules and b)…

A:

Q: At what average power must the engine of a car with a mass of 1.7 × 10³ kg, moving on an 11% slope…

A: SOlution: given that m = 1.7 × 10³ kg v = 31 km/hr =8.61 m/s slope =11%

Q: A skier of mass 64 kg is pulled up a slope by a motor-driven cable. (a) How much work is required to…

A: Given:Mass of the skier, m = 64 kgSlope = 30 degreesConstant velocity of the skier upto the slope, v…

Q: A box of winter jackets of mass 76 kg is droped from a stationary helicopter at an altitude of 98 m.…

A: The work done by the air resistance is the loss in kinetic energy according to conservation of…

Q: A power specification formula is to be derived for electric motors which drive conveyor belts moving…

A: The mass flow rate (m) can be converted to its value (say m1) in the SI unit (kg/s) as follows:

Q: In a building, building materials are raised using an electric motor with a power consumption of…

A:

Q: The dot product is an operation between two vectors and is a fundamental part of the definition of…

A: The vectors are given as,

Q: What average power is needed to accelerate a 1 kg soccer ball from rest to 36 km/hr in 0.1 seconds?…

A: Given data: Mass (m) = 1 kg Initial velocity (v0) = 0 m/s Final velocity (v) = 36 km/hr Time (t) =…

Q: A force of 12 lb is required to hold a spring stretched 2 in. beyond its natural length. How much…

A: Scenario - Work is done to stretch a spring beyond its original length. Given, Force→F=12 lb Initial…

Q: What is the current total mechanical energy of a 70-kg skydiver whose speed is 62 m/s at an altitude…

A: The kinetic energy of a body of mass m and speed v is given by, K = 12mv2 The potential energy for…

Q: A boy of mass m climbs up the stairs of vertical height h. What would have been work done if he uses…

A: The only force acting on the boy is gravitational force or his own weight "mg". So, when a body…

Q: what rate of work is developed by a 50.0 kg jogger who runs around a 1.00 km track three times in…

A:

Q: Under what conditions is the work done i) maximum and ii) minimum?

A: Given:-             Under the condition for the work done  i. maximum ii. minimum is following…

Q: How fast does a 48kg tiger running if it has a kinetic energy of 15 kilojoules? Express your answer…

A:

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

A: Given information: Here, mg is the average weight of the passenger, h is the height attained by the…

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 skier of mass 61 kg is pulled up a slope by a motor-driven cable. (a) How much work is required to…

A: Given:Mass = 61 kgDistance to be covered = 55 mAngle = 30oSpeed = 2.1 m/s

Q: What is the efficiency of a subject on a treadmill who puts out work at the rate of 106 W while…

A: It is given that power input ≡oxygen consumption of 2L/m ≡700W power output = 106 W

Q: A pump is driven by a motor with an output rating of 12 kW (that is, the motor will provide 12 kW of…

A:

Q: nat is the work done by a 2500 kg car whose velocity is 85 km/hr? und your answer to the nearest…

A: Given value--- mass = 2500 kg. final velocity = 85 km/h. We have to find--- work done

Q: OWhat is the efficiency of an out-of-condition professor who does 1.90 X 10 J of useful work while…

A:

Q: Procopio is driving a car (m = 1000 kg) at vj = 11.11 m/s when he stepped on the brakes. The car…

A: Given: The mass of the car is 1000 kg. The velocity is 11.11 m/s. The distance covered is 15 m.

Q: A boy of mass 45 kg climbs a vertical rope 9 meters in length in 15 seconds with constant velocity.…

A: Given: The mass of the object is 45 kg. The vertical height is 9 m. The time interval is 15 s.

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: An elevator has a mass of 4500 kg and can carry a maximum load of 1800 kg. At full load, it is…

A:

Q: Suppose the mass of a loaded elevator is 1700 kg.What force, in newtons, must be supplied by the…

A: Given mass of a loaded elevator is 1700 kg We have to find What force, in newtons,much work, in…

Q: In a training, you are doing a vertical climb using a rope to lift yourself by 5.0 m in 2 s. If you…

A: Given data: Height (h) = 5.0 m Time (t) = 2 s Mass (m) = 55 kg Required: Work done (W) and Power…

Q: A 1080 kg car accelerates at a rate of 2.1 m/s/s over a distance of 18 meters. How much work was…

A: Given, mass of the car, m = 1080 kg acceleration of the car, a = 2.1 m/s2 distance traveled, d = 18…

Q: In the figure shown, if the mass (m=6 Kg) is moving with constant speed and traveled a distance…

A:

Q: A force F = 3ti acts on a mass m and moves it with a velocity v = 0.5t2i .The instantaneous power…

A: Given that, Power is the dot product of force and velocity.

Q: Procopio is driving a car (m 1000 kg) at v = 11.11 m/s when he stepped on the brakes. The car…

A: mass of the car, m = 1000 kgintial speed, v1 = 11.11 msdistance traveled by car before comming to…

Q: Sir Jaykel Cuenca, a royal engineer of the Aiheistdräg Kingdom, was tasked to determine an efficient…

A: (A) The work done on a cargo, when it reaches half the height of the incline from the ground is,…

Q: A new record for runningthe stairs of the Empire State Building was set on February 4, 2003.The 86…

A: The total height gained by the runner to run 1576 steps is:

Q: What average mechanical power must a 70.0 - kg mountainclimber generate to climb to the summit of a…

A: Using Work-Energy theorem,

Q: How much work can a 1950 Watt motor do in 15 min? Express your answer in Joules.

A:

Q: Consider the figure below: Fapp = 120 N m = 30.0 kg f = 5.00 N d = 0.800 m w N Calculate the total…

A: Given data The force applied is given as Fapp = 120 N. The frictional force is given as f = 5 N.…

Q: In the figure shown, if the mass (m=7 Kg) is moving with constant speed and traveled a distance…

A:

Q: A 0.5-kg ball is thrown with a speed of 15.6 m/s at an angle 37.7 degrees. How high does it go? To…

A: Given: Mass of the ball m = 0.5 kg. The initial velocity of the ball v = 15.6 m/s. Angle of…

Q: A rocket sled having a mass of 1,501 kg reaches a speed of 352 m in 9.5 seconds. What average power…

A: