Show your complete solution. 4. If Marga exerts 350 J of work to make 125 W of power, how long did it take her to do thework in hours?INSERT YOUR ANSWERISOLUTION HER:5. A 120 kg airplane wheel moves at 98 m/s. how fast must a 2.35 g toy car wheel move inin order to have the same kinetic energy as the airplane wheel?INSERT YOUR ANSWER/SOLUTION HER:

Answered: Image /qna-images/answer/99edf0f4-c631-475c-b016-bbfaadd8af27.jpg

Answered: If Marga exerts 350 J of work to make…

Science

Physics

If Marga exerts 350 J of work to make 125 W of power, how long did it take her to do the work in hours?

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter7: Conservation Of Energy

Section: Chapter Questions

Problem 5OQ: Answer yes or no to each of the following questions. (a) Can an objectEarth system have kinetic...

See similar textbooks

Related questions

Q: A ship moves 330 m after 40,000 j of work is done on it. What force is used to do this work?

A: Given: The distance moved by the ship is 330 m. The work done is 40,000 J. To determine:…

Q: A car uses a power of 100 W within 25 seconds to operate. What is the work done?

A: Write the given values with suitable variables. P=100 Wt=25 s Here, P denotes the power and t…

Q: An elevator weighs 3600 N and must be lifted at a constant speed a vertical distance of 2.5 m in…

Q: A power mower does 8 x 104 J of work in 0.4 h. What power does it use?

A: Work done, W = 8 x 104 J = 80000 J Time taken, t = 0.4 h = 0.4 x 3600 s = 1440 s Power of the…

Q: A machine lifts a 35-kg object 20.0 m in 2.0 s. How much power is produced by the machine to lift…

A: Mass of object (m) = 35 kg vertical distance moved (d) = 20 mTime take (t) = 2 seconds

Q: A person pulled a 5.0-kg water bucket from the well with a height of 5.0 m in 15 s. What is the…

A: Power = work÷time Here, work = change in potential energy = mgH -0 ( ere we have taken bottom most…

Q: A man with 80.0 kg mass climbs a stairs with a height of 7.0 m within 15.0 seconds. What is his…

A: P=Et=mght

Q: A student weighing 400 N climbs a flight of stairs 2 m high in 6 s. What power in watts is required…

Q: A person does some work of 1,000 J in 2 s. His power will be ...... A) 1000W B) 25W C) 500W…

Q: A toy elevator is raised from the ground floor to the second floor in 20 seconds. The power needed…

A: Given Data: The time taken is, t = 20 s. The work done is, W = 1000 J. The power gives the value…

Q: A boy of mass 40 kg climbs a vertical rope 8 meters in length in 12 seconds with constant velocity.…

A: Mass of boy= 40 Kg Time = 12 s Height gain= 8 m

Q: How much time is required for a car engine to do 278 kJ of work, if its maximum power is 95 kW?

Q: A heavy rope, 50 ft long, weighs 0.5 lb/ft and hangs over a building 120 ft high. How much work is…

Q: How long Does it take a worker producing 200W of power to do 10,000 J of work?

A: Given data The power required by the worker is given as P = 200 W. The work required to do is given…

Q: How much power is needed to accelerate a 10 kg block from rest to 4 m/s in 2 s?

A: Given data: Mass (m) = 10 kg Initial velocity (u) = 0 m/s Final velocity (v) = 4 m/s Time (t) = 2 s…

Q: A piano with a mass of 137 kg is lifted 10 m above the ground in 5 s by a crane. What is the power…

A: mass of piano m = 137 kg height lifted h =10 m time t=5s

Q: If a runner exerts 350 J of work to make 125 W of power, then how long did it take the runner to do…

A: Consider the work exerted by the runner is 350 J. The power of runner is 125 W. The objective is to…

Q: How many watts of power do you expend when you exert a force of 50 N that moves a crate 6.0 m in 3.0…

A: Given data: Force (F) = 50 N Displacement (d) = 6.0 m Time (t) = 3.0 s

Q: If a runner exerts 350 J of work to make 150 W of power, then how long did it take the runner to do…

Q: How much work does it take to stop an 800 kg car traveling at 25m/s? If it takes 2 s to stop, what…

A: Given data: Mass of car (m) = 800 kg Initial speed of car (Vi) = 25 m/s Time (t) = 2 s Required:…

Q: A 50 kg sprinter accelerates from 0 to 11 m/s in 3.0 s. What is the output power for this rapid…

Q: If you push a cart with a force of 60 N resulting in 120 J of work, how far did you move the cart?

Q: An engine reaches its top speed from rest in 7.5 s. It is able to perform 250,000 J of work in that…

A: Given data: Given problem based on work and power. Time during which work is done, t= 7.5 sec Work…

Q: A weightlifter lifts a 240 kg weight a vertical distance of 0.3 m in 0.9 s. What is the power…

A: Given, mass of the object (m)= 240 kg vertical distance (h)= 0.3 m time (t) =…

Q: A student weighing 292 N climbs a flights of stairs 9 m high in 5 s. What power in watts is required…

A: Power is given by:- Power(P) = work done(w)/time taken(t). Here, work done is against gravitational…

Q: How much net work must be done to accelerate a 1000 kg 20 m / s to 30 m / s?

A: According to the work energy theorem, the work done must be equal to the change in kinetic energy.…

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: A person weighing 233 N climbs a flight of stairs 6.0 m high in 6.0 s. What power is required to…

Q: A compact car can climb a hill in 13 s. The top of the hill is 38 m higher than the bottom, and the…

A: Given information: The mass of the car (m) = 1400 kg The height of the mountain (h) = 38 m The time…

Q: If it takes 10.0 J of work to move an object 2.0 meters, what is the weight of the object?

A: The work done to move an object to a distance d is given as,…

Q: A body does 26 J of work in 3 seconds. Find the power?

A: Introduction : In this question we are provided with value of time taken and work done . with…

Q: A student of 50 kg climbs a flight of stairs 9.0 m high in 7 s. What power is required to perform…

A: The given values are, m=50 kgh=9.0 mt=7 s

Q: Suppose that 48 J of work is needed to stretch a spring from its natural length of 9 m to a length…

Q: How much power is required to lift a 30 N chair 0.20 m in 2 s?

Q: A boy of mass 45 kg climbs a vertical rope 9 meters in length in 15 seconds with constant velocity.…

A: Power output is force × velocity. Velocity =9m/15s = 0.6m/s

Q: The power of a motor is 40kW. At what speed can the motor raise a load of 20,000 N?

A: Given data: Power (P) = 40 kW = 40,000 W Force (F) = 20,000 N Required: Speed (v)

Q: An engine does 7500 J of work in one minute. The power output of the engine is 125 flb/s 0.17 hp 6.0…

A: Work done,(W) by an engine=7500 J -----(1) [Given] Time taken,(t) by an engine=1 min=60 sec -----(2)…

Q: A force of 35 N is needed to keep a 5.0 kg body moving at a constant speed of 7.5 m/s. What power is…

A: Given: The force on the body is 35 N. The mass of the body is 5.0 kg. The velocity of the body is…

Q: A 40-kg mass is lifted through a distance of 20 m in a time of 3 s. What average power is employed?

Q: Find the mass of an object if it requires 700 W of power to raise it to the height of 70 m in 1.1…

A: Power = 700 W Mass = M Height = 70 m Time = 1.1 minutes

Q: How much work (in J) is done to accelerate a car which has a mass of 1500 kg from a speed of 13 m/s…

A: Mass ( m ) = 1500 kg Initial Velocity ( u ) = 13 m/s Final Velocity ( v ) = 30 m/s

Q: How much power was expended by a car if it exerts a force of 1500.0 N and moves at 20.0 m/s?

Q: A 62 kg gymnast somersaults onto a mat at a speed of 10.37 m/s. When she is finished with the flip,…

Q: How long does it take a worker producing 200 w of power to do 10000 j of work?

A: Given information:Power (P) = 500 w.Work need to be produced (W) = 10000 J.We know that power is…

Q: A student weighing 279 N climbs a flight of stairs 5 m high in 9 s. What power in watts is required…

Q: A marathon runner of mass 75 kg runs up the stairs to the top of a tower of height 125 m in 8…

A: The expression for find work done in the process is W=Fd=mgd Substitute values in the above equation…

Q: A student weighing 300 N climbs a flight of stairs 6m high in 4 s. What power is required to perform…

A: Here work is done against gravitational force F = mg = 300 N

Q: How long (in s) does it take a worker producing 155 W of power to do 10,100 J of work?

A: The relation of the power is given as P=Wt Let W be the work done, P be the power, and t be the time…

Question

Show your complete solution.

4. If Marga exerts 350 J of work to make 125 W of power, how long did it take her to do the
work in hours?
INSERT YOUR ANSWERISOLUTION HER:
5. A 120 kg airplane wheel moves at 98 m/s. how fast must a 2.35 g toy car wheel move in
in order to have the same kinetic energy as the airplane wheel?
INSERT YOUR ANSWER/SOLUTION HER:

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 2 steps with 2 images

SEE SOLUTION Check out a sample Q&A here

Similar questions

Give an example of a situation in which there is a force and a displacement, but the force does no work. Explain why it does no work.
An 8.0-g bullet has a speed of 800 m/s. (a) What is its kinetic energy? (b) What is its kinetic energy if the speed is halved?
Answer yes or no to each of the following questions. (a) Can an objectEarth system have kinetic energy and not gravitational potential energy? (b) Can it have gravitational potential energy and not kinetic energy? (c) Can it have both types of energy at the same moment? (d) Can it have neither?
A student expends 7.5 W of power in lifting a textbook 0.50 m in 1.0 s with a constant velocity. (a) How much work is done, and (b) how much does the book weigh (in newtons)? The answers to Confidence Exercises may be found at the back of the book.
Spiderman, whose mass is 80.0 kg, is dangling on the free end of a 12.0-m-long rope, the other end of which is fixed to a tree limb above. By repeatedly bending at the waist, he is able to get the rope in motion, eventually getting it to swing enough that he can reach a ledge when the rope makes a 60.0 angle with the vertical. How much work was done by the gravitational force on Spiderman in this maneuver?
Give an example of something think of as work in everyday circumstances that is not work in the scientific sense. Is energy transferred or changed in form in your example? If so, explain how this without doing work.
. A compact car can climb a hill in 10 s. The top of the hill is 30 in higher than the bottom, and the car’s mass is 1,000 kg. What is the power output of the car?
A 500-kg dragster accelerates from rest to a final speed of 110 m/s in 400 m (about a quarter of a mile) and encounters an average frictional force of 1200 N. What is its average power output in watts and horsepower if this takes 7.30 s?
Integrated Concepts (a) Calculate the force the woman in Figure 7.46 exerts to do a push-up at constant speed, taking all data to be known to three digits. (b) How much work does she do if her center of mass rises 0.240 m? (c) What is her useful power output if she does 25 push-ups in 1 min? (Should work done lowering her body be included? See the discussion of useful work in Work, Energy, and Power in Humans. Figure 7.46 Forces involved in doing push-ups. The woman's weight acts as a force exerted downward on her center of gravity (CG).
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?
Calculate the power output in watts and horsepower of a shot-putter who takes 1.20 s to accelerate the 7.27-kg shot from rest to 14.0 m/s, while raising it 0.800 m. (Do not include the power produced to accelerate his body.) Figure 7.42 Shot putter at the Dornoch Highland Gathering in 2007. (credit: John Haslam, Flickr)
(a) What is the power output in watts and horsepower of a 70.0-kg sprinter who accelerates from rest to 10.0 m/s in 3.00 s? (b) Considering the amount of power generated, do you think a well-trained athlete could do this repetitively for long periods of time?