8. How much time is needed to produce 720 Joules of work if 90 watts of power is used?

Q: How much potential energy due to gravity would a person have if they are standing on top of the…

A:

Q: A coil spring which has a normal length of 13 cm is stretched 2.5 cm by a force of 34 N. How much…

A: Finding spring constant K   K=F/(elongation)   elongation in 1st case=2.5 cm F=34 N K=34/2.5 = 13.6…

Q: A box is lifted vertically 13.51 m and is then held there. The box has a weight of 29.72 N. Ignoring…

A:

Q: How much work must be done by frictional forces in slowing a 1,599-kg car from 14.7 m/s to rest?…

A:

Q: Work-done and power sent by them?

A: Given, Compare the workdone and power sent by the girl A and boy B,Where,  Girl take 45 sec to climb…

Q: 25. It is defined as the rate at which work is done. mechanical energy O power work O joule O o o O

A: The work can be expressed as,  W=Fs Here, F is the force applied, and s is the displacement caused.

Q: a steel ball of mass 1-kg is dropped from rest from the top of a building. if the air resistance is…

A: simply find equation for velocity and solve it then apply free falling equation with resistance and…

Q: 4) How many watts of power does a man with a weight of 600.0 N have when he climbs a flight of…

A:

Q: 1.13 Apply the grid method to calculate the cost in U.S. dollars to operate a pump for one year. The…

A:

Q: 1 Newton of force is applied to a stone to move 100 cm. Calculate the work done.

A: Given, Force = 1 N Displacement = 100 cm = 1 m Work done = ?

Q: 18. How much work is needed for a 73-kg runner to accelerate from rest to 7.7 m/s?

A: Given Mass of runner m = 73 Kg Initial speed u = 0 m/s Final speed v = 7.7 m/s To find Work done by…

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

A:

Q: 6. If an engine can produce 670 J of energy in 1 min, how many watts can it output?

A: as per our guidelines we are supposed to answer only one question. Kindly repost other question as…

Q: 13. A machine does 192 J of work in 24 Sec. What is the power of the machine?

A: Given data The work done by the machine is given ad W = 192 J. The time duration is given as T = 24…

Q: How much work must be done by frictional forces in slowing a 1,614-kg car from 15.6 m/s to rest…

A: Given data:  Mass of car (m) = 1614 kg Initial velocity (Vi) = 15.6 m/s Final velocity (Vf) = 0 m/s…

Q: Find work done F=12 N 14-5m

A: Given data:  Force (F) = 12 N Displacement (d) = 5 m Required: Work (W)

Q: Calculate the value of force applied if work done is 255 J and displacement is 15.3 m.

A: Given data :                 Work done     =    W                Displacement    =     d…

Q: 15. What kind of energy does the ball have just before it is released?

A: We are allowed to answer only the first question. For solutions to other questions, please re-post…

Q: The third floor of a apartment is 9.4 meters above street level. How much work is needed to move a…

A:

Q: Discuss the difference between energy conservation and energy efficiency and explain why energy…

A: Energy conservation involves using  less energy by adjusting our behavior and  habits. Energy…

Q: 4. Explain conservative forces and how it matters when computing for gravitational potential energy…

A:

Q: 41. The second floor of a house is 6 m above the street level. How much work is required to lift a…

A: Mass of refrigerator (m) = 300 kg  Height of second floor (h) = 6 m

Q: 10) A floor polisher supplies an average of 1000W of power. If the floor polisher is used for 10…

A: Given: The average power is 1000 W. The time interval is 10 min.

Q: 82. Raising a table requires work. Raising it twice as high requires O a. half as much work O b. the…

A: Raising a table required work if raising it twice as high required. The correct option is  Twice the…

Q: 29. A force of 15 pounds compresses a 30-inch spring 4 inches. How much work is done in compressing…

A: Given The force applied on the spring is F = 15 lb. The total length of the spring is L = 30 in. The…

Q: 18. What is the average power developed by a motor as it lifts a 400.-kilogram mass at a constant…

A: “Since you have asked multiple question, we will solve the first question for you. If youwant any…

Q: A steel ball of mass 4-kg is dropped from rest from the top of a building. If the air resistance is…

A: Mass of the body m=4 kg, time taken to hit the ground t=3.7 s and air resistance f=0.013v. Since the…

Q: A pallet weighing 575 N is lifted a distance of 20.0 m vertically in 10.0s. What power is developed…

A:

Q: 22) A compact car can climb a hill in 10 seconds. The top of the hill is 31 meters higher than the…

A: 22. The work needed to climb the hill is W=mgh=1027 kg9.8 m/s231 m=312002.6 J

Q: 5. Calculate the work being done on 2000 N crate, being lifted 2 meters off the ground by a crane.…

A:

Q: A steel ball of mass 2-kg is dropped from rest from the top of a building. If the air resistance is…

A: Given data: The mass of the ball, m=2 kg. The air resistance, fr=0.012 v. The time taken by the…

Q: 15. The third floor of a house is 8.0 meters above street level. How much work is needed to move a…

A: Potential energy : It is the energy held by an object because of its position relative to other…

Q: 9. is the total amount of kinetic energy and potential energy in a system.

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

Q: How much work (in J) is done in raising a 44.9 kg crate a distance of 1.5 m above a storeroom floor?

A: Given : Mass of crate is 44.9 kg             Distance is 1.5 m above a storeroom floor

Q: A young man exerted a force of 9,000 newtons on a 1200 kg stalled car but was unable to move it. How…

A: Applied force by the man F = 9000 N Mass of the car is m = 1200 kg

Q: A crane that's powered by a 175 watt motor lifts a crate 10.5m in 12.0s. What is the mass of the…

A: Power of motor (P) = 175 watt Distance (d) = 10.5 m Time (t) = 12 seconds

Q: 16. What kind of energy does the ball have just before it strikes the floor?

A: Let's suppose the ball is dropped from a height, 'h'.  Initially, the ball will be having the energy…

Q: If the energy of a mosquito (10−2 g at 0.5 m/s) were used to supply the energy needs of the world,…

A: N = Eworld/ Emusquito

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 137.6-kilogram object was pushed from rest to a speed of v meters per second, doing 21446.4 joules…

A: Here, the force used to push the car can be obtained as W=F×d21446.4J=F×1.4mF=15318.86N

Q: A student pushed a box 27.0 m across a smooth, horizontal floor using a constant force of 140…

A: The formula for the work is:

Q: A 1200-N force is applied parallel to a horizontal frictionless surface. It pushes an 80 N box 2m…

A:

Q: How much work is done by gravity when dead lifting a 100.0 kg barbell 64.11 cm from the floor to hip…

A:

Q: 18. Potential energy is energy possessed by an object due to its

A: The potential energy of an object is the amount of energy stored due to its position relative to the…

Instantaneous Power

Power is defined in physics as the amount of energy transmitted or transformed per unit time. The watt is the unit of electricity in the International System of Units, equivalent to one joule per second.