Suppose you expand 500 J of energy running up the stairs for 10 seconds. How much power did you generate? What would happen to the power if you took 20 seconds to run up the stairs instead

Q: What is power?  Calculate the power to move a 9 J box in 20 seconds. Calculate the power used for a…

A: 1. When the work is done in unit time, then the quantity is known as power. Power is also defined as…

Q: Power is measured in the units of? Choose all that apply.   A. kJ (Kilojoules)   B. Nm/s (…

A: Power = EnergyTime=Js=WattPower =Force ×displacementTime=Nms

Q: A monkey pulls a branch 110 meters with 12 Newtons of force. It takes her 20 seconds to do this. How…

A: Distance, d = 110 m Force, F = 12 N Time, t = 20 s   Power = Work / Time or P = W/t or P = Fd/t or P…

Q: A machine does 33,000 ft lbs of work in 1 minute. What is its power output per second

A:

Q: Think About It Does it take any work to push an object that does not move? Explain.

A: We feel tired while we try to move an object even though the object doesn't move. So, we might feel…

Q: A painter lifts a can of paint that weighs 40 N and carries it a distance of 2 meters. How much work…

A: In first part we have to find the work done (W) . Work done (W) = Force (F) * Dispalcement(D) Force…

Q: A 70- kg man can store about 120000  kcal of energy as fat. How far could such a man run on this…

A:

Q: force of 50.0lbs is used to push a box 10ft. across a level floor. How much work was done on the…

A: Given,  Force= 50 lbs Displacement= 10 ft Change in height or level= 0 ft

Q: The chin-up is one exercise that can be used to strengthen the biceps muscle. This muscle can exert…

A: Given:  force, F = 800 N  distance, d = 7.5 cm = 0.075 m  mass, m = 75 kg  distance of chin, y = 40…

Q: Explain what it means for a force to do work on an object.

A: The work done is given by

Q: Calculate the amount work is done by the engine of a 9000 kg truck if it accelerates from 5 m/s to…

A:

Q: A student is riding a bicycle at a constant speed of 4.13 m/s on a level road. The mass of the…

A: Given data: The velocity of student is v=4.13 m/s. The drag force is F=33.7 N. The mass of student…

Q: How can energy be transferred back forth between kinetic energy and potential energy?

A: Ans:-       Kinetic energy can be stored if we drop the object from the shelf or release the spring,…

Q: A Honda Civic does 778,825 joules of work to accelerate from 0 to 60 mph in 5.8 seconds. How much…

A: Power: Work done per unit time is called power.  It's unit is J/s  or watt(W)

Q: Your friend wants to solve the world's energy problem by inventing a device that will deliver 10…

A: By the energy conservation law, energy neither be created nor be distroyed it just changes the type…

Q: he kinetic energy of a bicycle is 800 Joules as it moves along a flat surface. How much power is…

A: Given, Kinetic energy of a bicycle, KE = 800 J time, t = 5 seconds

Q: The energy we require to live comes from the chemically stored potential energy in food, which is…

A:

Q: Explain the work you had done when running and walking in the stairs

A: Work done is defined as the product of the displacement (d) and the force acted in the direction of…

Q: Explain the transformation of energy in lifting a book from one level of a shelf to another.

A: Lifting a book from one level of a shelf to another.

Q: Explain the difference between energy and power and how they are related to work.

A: The differentiation between Energy and Power is as follows:

Q: Same set-up for the conservation of energy was performed. The 5-g marble covered a horizontal…

A: Given: mass of the marble, m=5 g=5×10-3 kg Elevation of ramp, h=15 cm=0.15 m Horizontal distance…

Q: what happens to the total mechanical energy of the system over time when you combine the potential…

A: Energy stored in a body due to its position is Potential Energy. P.E=mgh The energy, that a moving…

Q: During an energy-efficiency test, a student pulls a toy car up a ramp that is 2.5 m long. The…

A:

Q: A 5.2 kg can of paint is sitting on top of a 1.9 meter high step ladder. How much work did you do to…

A:

Q: Calculate the amount work is done by the engine of a 9000 kg truck if it accelerates from 5 m/s to…

A:

Q: . Calculate the work done in lifting a 500-N barbell 2.2 m above the floor. (What is the gain of…

A:

Q: While taking the stairs it takes you 10 seconds to reach the top. The next time you take the same…

A: The power required to climb is given by : P=Wt Where W is work done t is the time taken

Q: Which results in an increase in power?   A) doing more work in less time. B) doing less work in more…

A: Rate of doing work is known as power. The standard relation for the power (P) is given as,' P=Wt…

Q: What is the mechanical energy formula? How do you calculate mechanical energy when only kinetic…

A:

Q: If you do 29 J of work in 2.1 seconds, how much power was generated? Round to the hundredths place…

A: Given  Work done (w)  = 29 J  Time taken ( t ) = 2.1 s   Power is definined as rate of work done .…

Q: A water fountain uses 125 Watts of power each hour. It is run 24 hours each day for 7 days. If…

A: The formula for the amount of energy consumed by the fountain is:

Q: Same set-up for the conservation of energy was performed. The 5-g marble covered a horizontal…

A:

Q: a hydraulic catapult propels the car to the top of the ride, at a height of 450 ft. If the car and…

A:

Q: A learner weighing 800N runs up 20 stairs each 20cm high in 4 seconds.how much power is exerted by…

A:

Q: Calculate the work done if a 60 kg block of ice is pulled across a smooth surface using a chain 25º…

A:

Q: An electric hoist does 197000 J of work in raising a 226.3 kg load. How high was the load lifted

A: Work done is given by  W = m g h  where, m is the mass, g is the gravity and h is the height.

Q: In the Niagara Falls hydroelectric generating plant, the energy of falling water is converted into…

A: According to question--- Given value -- height = 52 m mass = 1 kg. required energy = 106 watt. We…

Q: Explain how you know there is work being done on an object?

A:

Q: A. Calculate the work done by a force of 29 Newtons that moves a box through a displacement of 28…

A:

Q: Envision yourself doing a jumping jack. Imagine you assume a standing X position, with your arms…

A: ques: Envision yourself doing a jumping jack. Imagine you assume a standing X position, with your…

Q: compare the workout you would get from riding a stationary bike while the Tv turned on versus off.…

A: Given : Workout on stationary bike.  Workout on TV turned On versus Off.

Q: roy does 15 Joules of work to push the pencil  over a distance of 15 cm. How much  force  did  she…

A: We know, W=F×dF=Wd

Q: An electric elevator with a motor at the top has a multistrand cable weighing 6.5 lb/ ft. When the…

A:

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

A: We know thatPower=WorkTime

Q: 1. What happens to the work if the same person goes up the stairs slower? 2. What happens to the…

A: 1. Work done by the same person is independent of the fact that he climbs up the flight of stairs…