Initlal K; + , + U, + - K, + + Uy + AEdam + AEtbem te= 0.80 s yf = 0.70m t; = 0 Yi = 0 Earth mbarbell =13.6 kg Earth 3. The weightlifter, not in the system, raises a barbell.

Q: A 42-kg pole vaulter running at 11 m/s vaults over the bar. Her speed when she is above the bar is…

A:

Q: If the power generated by a wind system at a height of 50 m is equal to 30 kw at a wind speed of 4…

A:

Q: A certain rain cloud at an altitude of 2.04 km contains 3.20 x 10' kg of water vapor. How long would…

A:

Q: Which point/s is/are the state of the system?

A: In thermodynamics , the state of system is represented by specifying its pressure , volume and…

Q: A weightlifter lifts a 50 kg bar from the floor to a position over his head and back to the floor…

A: To find energy transformations that has taken place, by the weightlifter. Given, Mass of bar, m = 50…

Q: Estimate the rate at which energy flows from a gasoline pump to a motor vehicle during  a “ fill-up.…

A: Given: The HHV of 1 gallon of gasoline is 145,000 Btu It takes 5 minutes to fill up a 16-gallon…

Q: Question 9) During a board game called Rat Trap0, mechanical contraptions are activated in a…

A: The given values are, m=50.0 g=0.05 kgEloss=2.0 Jhi=17 cm=0.17 mhf=4.0 cm=0.04 mvf=13 m/s

Q: Wile E is back again! And again he's falling, this time from a 30m cliff. Wile E mass is 63kg. a.…

A: Given data: Height of the cliff (h) = 30 m HA = (1/3)h = 10 m Need to determine the speed at point…

Q: A 54-kg pole vaulter running at 10 m/s vaults over the bar. Her speed when she is above the bar is…

A: Given:- mplayer= 50 kg vi= 10 m/s vf= 1.0 m/s yi= 0 m

Q: Cite an example of the Law of Conservation of Energy and explain

A: Cite an example of the Law of Conservation of Energy and explain

Q: QUESTION 6 How much energy does it take to lift a 100 kg box from the floor to a 1.5 m high shelf?…

A: Given: m=100 kgh=1.5 m

Q: A tire 1.0kg small monkey does the push-ups by applying force of force to elevate its center-of-mass…

A: Given data: Mass (m) = 1.0 kg Work (W) = 0.5 J Time (t) = 2.0 s Height (x) = 5.0 cm Required: Power…

Q: Calculate the gravitational potential energy of a 12• 3 kg box on a shelf 7.0 m above the floor.…

A: Given that                   The mass of the box is (m) = 12.3 Kg                   Height of the…

Q: While hovering, a particular flying insect applies an average force equal to three times its weight…

A: Givenmass, m=1 gm               =0.001 kgdisance, d=1.5 mm                  =0.0015 mstrokes,…

Q: According to the law of conservation of energy: O Energy is conserved only when the device is 100%…

A:

Q: List the energy conversions that occur when riding a bicycle.

A: In riding a bicycle

Q: Q8 (a) (1) Distinguish between renewable and non-renewable energy sources giving an example of each…

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

Q: When a battery provides power to a hand-held fan, what kinds of energy are present and how do they…

A: Given:  A battery operated hand held fan The law of conservation of energy states that the energy…

Q: C7 21.) If a hair dryer is rated at 1300 W, how much energy does it require in 6 minutes?…

A: Power=Work/time Work=Power X time

Q: An 83kg man eats a banana of energy content 1.00x10^3 kcal. If all of the energy from the banana is…

A: Given that,Mass : m= 83 (kg)Energy : E =1×103 (kcal)Velocity  : v0 = 0 (m/sec)Here we need to find…

Q: Now Jed and Kadia tackle a homework problem: An object of mass m, = 13 kg and velocity v, 5.5 m/s…

A:

Q: A) Explain the Law of Conservation of Energy in the context of this problem.

A: The law of conservation of energy states that the total energy of any system during any process…

Q: A man spends 2.4 kJ energy in displacing a body by 48 m in the direction in which he applies force…

A: Given, Work done by man, W = 2.4 kJ distance moved, d = 48 m time, t = 1.5 s

Q: n rain cloud at an altitude of 1.50 km contains 3.20 x 107 kg of water vapor. How long would it take…

A:

Q: Write any two practical examples of the law of conservation of energy?

A: Example 1: A simple example is dropping a cell phone on the floor. Initially the phone has…

Q: How much power is needed to lift a 750 kg elephant 14.3 m in 30.0 seconds?

A: Given data:  Mass (m) = 750 kg Height (h) = 14.3 m Time (t) = 30.0 s Required: Power (P)

Q: nth of November'2020 =

A:

Q: ric power companies use water to store energy. umped from a low reservoir to a high reservoir. he…

A: Given information: Here, P is the power, h is the height and ρ is the water’s density.

Q: A 44-kg pole vaulter running at 10 m/s vaults over the bar. Her speed when she is above the bar is…

A: We must use conservation of energy in this question.

Q: A AA battery is used to power a motor that raises a 10-g pencil tied to a string 33 meters until it…

A: Mass m of the pencil =10g=0.01kgheight h through which it is raised = 33mg the acceleration due to…

Q: A man spends 3.2 kJ energy in displacing a body by 16 m in the direction in which he applies force…

A:

Q: 68. What is the cost of operating a 3.00-W electric clock for a year if the cost of electricity is…

A: Given data: Power (P) = 3.00 W Time (t) = 1 year Cost of electricity = $0.0900 per kW.h Required:…

Q: A 41-kg pole vaulter running at 11 m/s vaults over the bar. Her speed when she is above the bar is…

A: Given, Mass is 41 kg, Initial speed is 11 m/s and final speed is 1.5 m/s

Q: Which of the following is the best example of increasing the potential energy of water? A pouring…

A: Since the gravitational potential energy of an object is directly corresponding  to its peak region…

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.