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: 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: A 50.0-kg marathon runner runs up the stairs to the top of Chicago’s 443-m-tall Willis Tower.…
A: Given: m = 50.0 kg h = 443 m t =15.0 minutes = 15.0*60 sec = 900 sec
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: How much power does it take to lift a 49kg person a 5m vertical distance in 20s?
A: Given: mass, m = 49 kg height, h = 5 m time, t = 20 s
Q: Compute the kinetic energy of 1200kg automobile traveling at 20km/hr.
A: Given, Mass of automobile,m=1200 kg Speed, v=20 km/h=5.5 m/s
Q: The power needed to accelerate a projectile from rest to its launch speed v in a time t is 33.0 W.…
A: Note that power is energy or work done per unit time. initial power is, P=KEtP=12mv2t the final…
Q: A student weighing 400 N climbs a flight of stairs 2 m high in 6 s. What power in watts is required…
A:
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 2000kg car accelerates to 20 m/s. If the car can do this in 10 seconds, what was the average…
A: Given: Mass of car (m) = 2000 kg Final velocity of car (v) = 20 m/s Time taken to achieve final…
Q: How much work has to be done to accelerate 1320kg car from 115km/h to 130km/h ?
A: Given data: Mass of car (m) = 1320 kg Initial velocity of car (Vi) = 115 km/h Final velocity of car…
Q: Find the power generated If a 750 N force causes an object to reach a final velocity of 32 m/s?
A: Given, Force = 750 N Final velocity = 32 m/s We know that power generated = force×velocity
Q: What is the potential energy of a 15 kg dumbbell sitting on a weight bench 0.65 m above the floor?
A:
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 car's engine generates 120,000 W of power as it exerts a force of 12,000 N. How long does it take…
A: Force=12000 N Displacement=120 m Work done(W)=Force*Displacement=12000*120 J=1440000 J
Q: A 1600-pound elevator is suspended by a 200-foot cablethat weighs 10 lb/ft. How much work is…
A:
Q: A 1400 kg car accelerates from 5 m/s to 10 m/s. The net work done by the car is VI V2 500 kJ 200 kJ…
A: Given: The mass (m) of the car is 1400 Kg. The initial velocity (u) of the car is 5 m/s. The final…
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 data: Mass, m = 13.4 KN Angle, θ=8 deg Speed, v = 80 kph = 80/3.6 = 22.22 m/s…
Q: A student weighing 311 N climbs a flight of stairs 3 m high in 6 s. What power in watts is required…
A:
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: Calculate the power output needed for a 952-kg car to climb a 2.00° slope at a constant 33 m/s while…
A:
Q: How far must you stretch a spring with k = 1000 N/m to store 200 J of energy?
A: It is given that,
Q: A 26 meter chain is hanging from a winch located 26 meters above the ground. If the chain weighs 4…
A: Basic: we know that the work done is given by force into. Displacement so we just find the small…
Q: A 75 kg student runs up the stadium stairs for a distance of 15.00 m in 5.0 seconds. How much power…
A: mass = m = 75 kg height = h = 15 m time = t = 5 sec
Q: A 1600 lb elevator by a 200ft cable that weighs 10 lb/ft. How much work is required to raise the…
A: Consider 1600-lb elevator is suspended by a 200-ft cable that weighs 10 lb/ft The objective is to…
Q: What is the potential energy of an airplane that is only 0.5489 km off the ground and weighs 4120 kg
A: Given that, an airplane that is only 0.5489 km off the ground. That means Distance, d = 0.5489 km…
Q: If a 1000 kg car is exiting a highway through an above-the-ground ramp of 5.0 m radius at 12 m/s,…
A: The given values are, m=1000 kgr=5.0 mv=12 m/s
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: What is the work performed in compressing a quadratic spring, F=kx2, with k=200 N/m2, from 2 m to 3…
A: Work can be expressed as, W=∫Fdx
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: 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: How much power is required to lift a 30 N chair 0.20 m in 2 s?
A:
Q: What is the average power supplied by a 60 kg person running up a flight of stairs a vertical…
A: The person’s average power can be determined as, Here, W and t represent the work done and the…
Q: Compute for the gravitational potential energy of a 60.0 kg mountaineer who is 500 m above the…
A: Given data: Mass (m) = 60.0 kg Height (h) = 500 m Required: Gravitational potential energy
Q: A 2000 kg car can accelerate from rest to 50 m/s in 4.2 seconds. How much power does the engine…
A: The initial speed of a car is, u=0 m/s The final speed of a car is, v=50 m/s The car's mass is,…
Q: As part of a charity fund-raising drive, a Chicago marathon runner of mass 50.0 kg runs up the…
A: Given data: Mass of runner (m) = 50.0 kg Height of building (h) = 443 m Time (t) = 15.0 minutes…
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: What is the potential energy of an 800kg elevator at the top of a tall building 380m above the…
A:
Q: How much power is needed to accelerate a 1250 kg sports car from rest to 25 m/s in 4.5 seconds?
A:
Q: How much power does it take for a 60 kg person to run up stairs at a rate of 2.5 steps per second if…
A: Given data: Mass (m) = 60 kg Time (t) = 1 s Number of steps rup up in 1 second = 2.5 Height of each…
Q: How much force is exerted by the Soccer player in pushing the ball to the goal, having the work done…
A: Given data The work done by the soccer player is given as W = 75 J. The distance covered by the ball…
Q: A bag of wheat weight 430 kg. To what height should it be raised so that potential energy is 9150 J…
A:
Q: Calculate the power output needed for a 952-kg car to climb a 2.00° slope at a constant 33 m/s while…
A:
Q: The length of the Achilles tendon increases 0.500 cm when the force exerted on it by the muscle…
A: Force increased from 3205 N to 4772 N.
Q: A student who weighs 559 N climbs a stairway vertical height of 3.0 m in 28 s how much work is done?…
A: Weight of a student (w) = 559 N Height of stairway (h) = 3 m Time taken (t) = 28 s
Q: How much work has to be done to accelerate 1320kg car from 105km/h to 120km/h?
A:
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- A large household air conditioner may consume 15.0 kW of power. What Is the cost of operating this air conditioner 3.00 h per day for 30.0 d if the cost of electricity is $0.110 per kWh ?A person in good physical condition can put out 100 W of useful power for several hours at a stretch, perhaps by pedaling a mechanism that drives an electric generator. Neglecting any problems of generator efficiency and practical considerations such as resting time: (a) How many people ‘would it take to nm a 4.O0-kW electric clothes dryer? (b) How many people would it take to replace a large electric power plant that generates 800 MW?Ace Industries has a 50 kW air compressor that operates at full-load (LF = 1), all day for 365 days per year. the motor for the air compressor cost €1400, the motor efficiency is 90%, and electricity costs €7.00/kW/month and €0.10/kWh, how much does it cost to operate the air compressor for one year?
- Suppose that your refrigerator consumes 150 W of power. If the cost of electricity is $0.15 per kWꞏh, whatis the cost of providing power for your refrigerator for one year?A typical desktop personal computer uses around 100 W of power when carrying out intensive processing, such as running a video game. If you play such a game for 90 minutes, how much energy (in joules) will it use?3:12 24 1.13 Apply the grid method to calculate the cost in U.S. dollars to operate a pump for one year. The pump power is 20 hp. The pump operates for 20 hr /day, and electricity costs $0.10 per kWh.
- A typical incandescent reading lamp runs at 60W. If it is left on constantly, a) how much energy (in MJ) is consumed per day, and b) what is the weekly cost (in $) if energy is charged at a rate of 12.5 cents per kilowatthour? Write your answer in two (2) decimal placesA large household air conditioner may consume 15.0 kW of power. What is the cost of operating this air conditioner 3.00 h per day for 30.0 d if the cost of electricity is $0.110 per kW · h ?An electric motor is rated at 10 horsepower (HP) and costs $800. Its full-load efficiency is specified to be 85%. A newly designed, high-efficiency motor of the same size has an efficiency of 90%, but costs $1,200. It is estimated that the motors will operate at a rated 10-HP output for 1,500 hours a year, and the cost of energy will be $0.07 per kilowatt-hour. Each motor is expected to have a 15-year life. At the end of 15 years, the first motor will have a salvage value of $50, and the second motor will have a salvage value of $100. Consider the MARR to be 8%. (Note: 1 HP= 0.7457kW.)(a) Determine which motor should be installed based on the PW criterion.(b) What if the motors operated 2,500 hours a year instead of 1,500 hours ayear? Would the motor selected in (a) still be the choice?
- A standard computer has a power supply of 550 W, and many people just leave their computer on all thetime. Calculate the amount of money it costs to run a 550 W computer for 24 h, if electricity costs 7.5¢/kWh.A 220v 2 hp motor has an efficiency of 80%, If power costs 3.00 per kh hr for the first 50 kw hr, 2.90 for the second 50 kwhr, 2.80 for the third kw hr and so on until a minimum of 2.00 per kwhr is reached, how much does it cost to run this motor continuously for 7 days.An elevator has an electrical power rating of 3.2 x 104 W. If the elevator takes 42 s to move up 3 floors (12 m total), what is its efficiency? Assume the mass of the elevator and its passengers is 1800 kg.