By converting the power of loudspeaker,3700 000 Watt into kilowatt, we get

Q: A loader lifts a 20kg load to a height of 3m in 5 seconds. How much power was demonstrated

A: Given data:  Mass (m) = 20 kg Height (h) = 3 m Time (t) = 5 s Required: Power (P)

Q: How much power is provided by a motor if it does 27 J of work in 3.0 seconds?

A: Work = W = 27 J Time = t = 3 s Power is defined as the work done per unit time. The mathematical…

Q: Suppose a crane lifts a 900 kilogram wrecking ball 12 meters above a concrete slab. 105,840 Joules…

A: The formula for the potential energy is: Substitute the known values and solve.

Q: A laptop computer consumes about 40 watts of electricity per hour when operating. At $0.20 per…

A: Power of laptop = 40 watt Time = 10 hours  Cost of electricity = $0.20 per kilowatt hour

Q: How far will a 70 Newton crate be moved if 3500 Joules or work are accomplished?

A: The expression for the work done(W) by any force(F) on a body is given by, W = F×s, where 's' is the…

Q: What does it mean for something to have energy?

A: In the given question, we have to discuss about the term energy.

Q: An object with a mass of 100 grams (0.100kg) is dropped from a certain height and has a a velocity…

A:

Q: A light bulb produces 400J of light energy and is 20% efficient. How much energy does it use?

A:

Q: A bakery has a 6,100W oven that runs every day from 5am until 7pm making tasty pastries for the…

A: Given: Power of bakery = 6100 W = 6.1 KW The time of bakery runs per day = 5 am to 7 pm = 14 hours…

Q: You did 7,500 Joules of work by running up some stairs in 2.3 seconds. What power did you exert?

A:

Q: A washing machine has a power requirement of 2500 W. Every month the machine is used for 6.0 hours.…

A: power requirement of washing machine = 2500 Wtime = 6 hours cost of electricity = 13 cents/kWh

Q: An electric heater of power 3kW is used for 10h. How much energy does it consume? Express your…

A: The expression for the energy is given by,

Q: It took a 36,000 Newton force to make a car move 1,500 meters. How many Joules of work is performed…

A: Given: Force F=36000N Displacement d =1500 m To find: Work W=??

Q: If you use a 1000-watt microwave oven for 20 seconds, how much work does it do?

A:

Q: An engine is rated at 200 W of power. How much energy is used in 1 minute? How much energy is used…

A: Power of engine (P) = 200 W t1 = 1 minute = 60 seconds t2 = 1 hourusing , 1 hour = 3600 seconds =…

Q: By converting the power of loudspeaker,3700 000 Watt into kilowatt, we get O a. 3700kW O b. 37000kW

A: This question is based on conversion of unit.

Q: What is the kinetic energy of a 4 kilogram cat runnig at 5 m/sec ?

A: given that,mass of cat, m=4 kgvelocity of cat, v=5 ms

Q: How much work would have to be done to bring a 980-kg automobile traveling at 87 km/h to a stop?

A: Mass of the automobile = 980 kg Speed of the automobile = 87 km/h…

Q: A ball with 100 J of PE is released from a height of 10 m. What will be the KE of the ball at 5 m?

A:

Q: suppose you lift a laptop that weighs 5.5 pounds off the floor onto a shelf that is 5 feet high. How…

A: The weight of the laptop in kilograms is 5.5 pounds = 5.5×0.453592kg≈2.5kg The height in meters is 5…

Q: What is the horsepower of a 1,500.0 kg car that can go to the top of a 345.0 m high hill in exactly…

A: Given- Mass of car m=1500 kg Height h=345 m Time t= 1 minute=60 seconds g=9.8 m/s2

Q: A 75 kg sprinter accelerates from 0 to 8.0 m/s in 5.0 s. What is the metabolic power, in kW…

A: Given data: The mass of sprinter is m=75 kg. The initial speed is u= 0 m/s. The final speed of…

Q: How much power does a high-end gaming machine need to remain operational?

A:

Q: How much work is done lifting a 120-pound chair from the ground to the top of a 40-foot building…

A:

Q: A book on a shelf has potential energy of 200J and two times the mass of a book next to it. What is…

A: Given data The gravitational potential energy for the book is given as PEh = 200 J. The…

Q: If energy cost 5 cents per kilowatt-hour, how much is one horsepower-hour worth?

A:

Q: How high would a 4.8 kg squirrel has to climb a tree to have a gravitational potential energy of 52…

A: GivenGravitational potential energy = 52 JMass of squirrel (m) = 4.8 kg

Q: How much work is done moving a 2.4 kg book to a shelf 4.0 m high?

A:

Q: A 75 kg sprinter accelerates from 0 to 8.0 m/s in 5.0 s. What is the metabolic power, in kW…

A: Given data The mass of the sprinter is given as m = 75 kg. The initial velocity of the sprinter is…

Q: How much work is required to lift a 5.0-kg concrete block to a height of 3.4 m?

A: Work required to lift the concrete is given by, W=Fr........................(1) Where, W=work…

Q: A man weighing 73.4 kg is standing at the 4th floor of a building, which is 15 meters above the…

A: Mass of the person m=73.4 kg, height at which he is standing from the ground h=15 m and acceleration…

Q: What is the cost of running a 0.200-kW computer 6.00 h per day for 30.0 d if the cost of electricity…

A: The energy consumed in kWh is

Q: How much power is used if a force of 35-6 newtons is used to push a box a distance of ?10 meters in…

A: Power is rate of doing work  P=W/t

Q: A machine develops 30 W of power in 3 minutes. How much work is done by the machine in this time?

A: The work done and power relation is P=Wt t=3 min=180 sP=30 W

Q: An object of mass 4 kg has a speed of 9 m/s and moves a distance of 7 m. What is its kinetic energy…

A:

Q: if a person pushed a box about 5 meter by the force of 50N and the frictional force is 43N,what is…

A:

Q: A car moving 50 km/hr skids 15 meters with locked brakes. How far will the car skid with locked…

A: The kinetic energy is equal to the work done by the car,

Q: If you lift a box using a 100 J of work within 5 s, how much power has been done? How much is the…

A:

Q: How much work must be put into a machine that is 70.0% efficient in order to lift a mass of 400.0 kg…

A:

Q: A man climbs on to a wall that is 3.4m high and gains 22681 of potential energy. What is the mass of…

A: According to question we need to find mass of man ?

Q: How much work is done to move a 10900 N car 28 meters?  joules

A: Given data The force to move the car is F=10900 N The distance move by the car is d=28 m   The work…

Q: A crane exerts 56,000 Newtons of force over a distance of 4.5 meters. How much power was generated…

A: Given :-  F = 56000 N distance = 4.5 m time = 4.2 sec

Q: A laptop computer consumes about 40 watts of electricity per hour when operating. At $0.20 per…

A: Given data:  Power (W) = 40 W = 0.040 kW Time (t) = 10 h Electrical cost = $0.20 per kWh Required:…

Q: A bicycle with a mass of 14 kg traveling at a velocity of 3 m/s east has how much kinetic energy?

A: Given data:  Mass (m) = 14 kg Velocity (v) = 3 m/s Required: Kinetic energy (KE)

Q: Calculate the work done when a force of 5N moves a book 1.2m?

A: Given:Force applied, F = 5 NDistance moved by the book = 1.2 m

Q: What is the kinetic energy of a baseball whose mass is 0.15kg if it is thrown with a velocity of…

A: Given data:  Mass (m) = 0.15 kg Velocity (v) = 22 m/s Required: Kinetic energy (KE)

Q: How much work is done in raising a 42.3 kg crate a distance of 1.5 m above a storeroom floor?

A:

Q: What is the kinetic energy of a 0.43-kg soccer ball kicked  at  36.5 m/s?

A:

Q: A chain 59 meters long whose mass is 23 kilograms is hanging over the edge of a tall building and…

A: It is given that,