Mohan, having a mass of 40 kg, runs up a staircase of 50 steps in 10 s. If the height of each step is 15 cm, then what is his power?

Q: You are using a 3 horsepower motor to lift a 45 kg package. How high can the package be lifted in 1…

A: The given data are: m=45 kgP=3 hp=2238 Wt=1 min=60 s Here, m denotes the mass, P denotes the power,…

Q: When you lift a box with a mass of 350 kg to a height of 2.5 meters, how much work have you done?

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Q: A bag of wheat weight 2300 kg .To what height should it be raised so that potential energy is 7890J?…

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Q: How much work is needed to stop a 1330 kg car that is moving straight down the highway at 15 m/s?

A: Given: mass of the car (m) = 1330Kg            Initial speed of the car (u) = 15 m/s…

Q: It takes a force of 35 N to stretch a 45-cm spring to 90 cm and hold it there. How much work was…

A: Given The force to stretch the spring is F=35 N. The initial length of spring is xi=45 cm. The…

Q: A cyclist in a race must climb a 5° hill at a speed of 8 m/s. If the mass of the bike and the biker…

A: Given: The angle of inclination of the hill = 50 Speed of the cyclist = 8 m/s Mass of the bike and…

Q: If a person moves a trolley for a distance of 10 m with a force of 50 N, then the work done is: A)…

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Q: what is the horsepower of a 1500.0 kg car that can go to the top of a 342.0 m high hill in exactly 1…

A: GivenMass m = 1500 kgHeight h = 342.0 mDuration t = 1 min = 60 s

Q: A student weighing 400 N climbs a flight of stairs 2 m high in 6 s. What power in watts is required…

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Q: If 3 J of work is needed to stretch a spring from 13 cm to 15 cm and another 5 J is needed to…

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

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

A: The power exerted on the book can be given by

Q: The car weighing 1.0 × 10³ kg has an engine with a power of 80 kW. What is the biggest acceleration…

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Q: A force of 1 pounds is required to hold a spring stretched 0.5 feet beyond its natural length. How…

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Q: A ball of 7 kg has velocity given by ü = ( 6 î - 5 ĵ + 2 k ) m/s What is the kinetic energy? Answer…

A: Mass of the ball is m = 7 kg velocity of the ball is v = 6i - 5j +2k

Q: A 60 kg woman whose average power is 30 W can climb a mountain 2.0 km high in

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Q: Ruth is moving a heavy box a distance of 14 m across the floor of her bedroom. If she does 9000 J of…

A: total distance moved = 14 m work done = 9000 J time taken = 3 seconds

Q: A 70 kg person runs up a staircase 3.0 m high in 3.5 s.  How much horsepower does he develop in…

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Q: An object of mass 3.00 kg is dropped off the top of a building which is 57.3 m high. How far is the…

A: The kinetic energy of the object at the top most point is zero. The total energy of the object at…

Q: If a 75 kg runner can accelerate from standing start to a speed of 10 m/s in 3 seconds, how much…

A: Since the runner starts from a standing position, the initial velocity of the runner is u=0 m/s.…

Q: Suppose your mass is 83.5 kg and you climb 40 stairs of height 18 cm in 16.0 s. What is your power…

A: (given)                             Mass = 83.5 kg                           Total distance =…

Q: What is the average power must produce to accelerate car with 1500 kg from rest to the speed 30…

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Q: if you pull a wagon with a force of 200 Newton's and it takes you 20 seconds to pull it 10 meters of…

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Q: A 5.0 kg object is moving at 3 m/s? By what factor does its kinetic energy change if its mass is…

A: Write the given values with the suitable variables. m1=5 kgv=3 m/sm2=m12=5 kg2=2.5 kg Here, m1, v,…

Q: 1. A marble weighing 4.0 kg, travels at a speed of 7.0 km/h. What is its kinetic energy? 7km/h 1.94…

A: Mass of marble , m= 4.0Kg Speed, v= 7 Km/h

Q: If a 600 N student climbed a 15 ft flight of stairs in 8 sec, what horsepower did that student…

A: Given data: Weight (mg) = 600 N High (h) = 15 ft Time (t) = 8 s Required: The power (P) in…

Q: A quarterback throws a football weighing 205 g at a speed of 10.0 km/h at a height of 20.0 m. What…

A: Given,A quaterback throws a footballweighing, m = 205 g = 0.205 kgspeed, v = 10.0 km/h = 2.78…

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: A force of 1 pounds is required to hold a spring stretched 0.4 feet beyond its natural length. How…

A: Given : F1=1 pounds x1=0.4 feet x2=07 feet In this question we have to find the work done in…

Q: A man whose weight is 700 N takes 2.5 min for climbing up a staircase. What is the powerdeveloped in…

A: Work = force x distance Power is defined as the rate of doing work.

Q: What is your average power if you lift a 36.1 kg box at a constant speed to a height of 1.31 m in…

A: Calculate the work required for the to lift the mass. W = increase in potential energy of the mass…

Q: How much power is developed by an airplane that cruises at 300 m/s when the thrust of its engine is…

A: Power=work (W)time (t)            =force (F)·displacement (S)time (t)            =force…

Q: if you pick a mass of 14.4 kg from the ground up to 1.26 m above the ground and it takes 1.1 s to do…

A: Given data :               Mass of the object, m = 14.4 kg               Height from ground, h =…

Q: A force of 1 pounds is required to hold a spring stretched 0.2 feet beyond its natural length. How…

A: Given  Force, F = 1 lb  Stretching distance from its natural length , x = 0.2 ft  From Hooke's law-…

Q: A motor has a power output of 1000 W.  How fast would this motor lift a 20 kg mass to a height of 10…

A: Motor would lift 20kg to height of 10m in 1.96 seconds

Q: How much energy does it take to apply a 400 newton force to push a car 4 meters?

A: Given data The magnitude of force applied is F = 400 N The distance moved by car is d = 4 m

Q: Krishna is quite skilled at skateboarding and moves across the sidewalk at a fast pace of 4 m/s. If…

A: The expression for the kinetic energy is written as, Here, m and v represent the mass of Krishna…

Q: What average power is required for a runner with a mass of 80 kg to reach a speed of 9 m/s during a…

A: Solution: Given that m = 80 kg v = 9 m/s t = 2 s

Q: A 5.0 kg object is moving at 2.29 m/s? By what factor does its kinetic energy change if its speed…

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Q: How much power is needed to accelerate a 1250 kg sports car from rest to 25 m/s in 4.5 seconds?

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Q: A chimp climbs on to a wall that is 3.6m high and gains 2 268 J of potential energy. What is the…

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Q: If a car of mass 1200 kg is moving along a highway at 120 km/h, what is the car’s kinetic energy as…

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Q: A 40 kg boy runs up a staircase to a floor 5 m higher in 7 s. What is his power output?

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Q: What is the work done pushing a box 3 m with a constant force of 100 N? What if the box moves 6 m?

A: The expression for find work done is W=F·d                           ...... (1) Substitute values in…

Q: An object which weighs 10 N is dropped from rest from a height of 4 meters above the ground. When it…

A: The potential energy at the beginning of the fall is

Q: An engine develops 45 kw of power. How much time does it take to lift 550 kg to a height of 50 m ?

A: Given: The power developed by the engine is 45 kW. The mass of the object is 550 kg. The height of…

Q: How much work has to be done to accelerate 1320kg car from 105km/h to 120km/h?

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Q: A student weighing 300 N climbs a flight of stairs 6m high in 4 s. What power is required to perform…

A: Here work is done against gravitational force F = mg = 300 N