Weightlifter A B C D Mass (kg) lifter B lifter C lifter D lifter A 100.0 150.0 200.0 250.0 Distance (m) 2.25 1.76 1.50 1.25 Four weightlifters A through D enter a competition. The mass and distance that each lifts are shown in the table. Which weightlifter does the least work?

Q: During a drag race Car A does work in moving 500 m in 4 seconds whereas Car B does the same work in…

A: Given two cars A and B does same work. Time of car A  tA = 4 sec Time of car B tB = 5 sec We have to…

Q: In the figure, the rock weighs 130 lb and is lifted 1 ft by the lever. F Fulcrum 3F 3d (a) How much…

A: Given data: a)Force F=130lb    Distance d=1 ft b) Distance d=3 ft

Q: How much work input by the second bicyclist's muscles was required to accelerate themselves…

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Q: The person does work on the lawn mower. Under what conditions would the mower gain energy? Under…

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Q: An object only has mechanical energy when it is moving. True or False?

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Q: net work of 48.6 J is done on a 2.73 kg object that is initially at rest, what is the object's final…

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Q: Your gasoline engine has a limited supply of gasoline, able to do 5000 J of work. If you weigh 800…

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Q: Is it possible to increase the kinetic energy without the application of external force?

A: yes the kinetic energy will increase without applying any external force. for example, when we kept…

Q: If you pull a wagon with the force of 200 N and it takes you 20 seconds to pull it 10 m on flat…

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Q: If a skier at the top of a half-pipe has 1200 J of potential energy, How much kinetic energy will…

A: For the skier the total energy will be conserved as there is no friction. At bottom the skier will…

Q: The figure represents the work curve. How much work is done? 因 0 5 x (m) F (N)

A: Answer : Work-done is nothing but the area under that straight line in the above Force-Displacement…

Q: (The result of work done on a body = change in the body's kinetic energy) is the text of a theory: -…

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Q: Steve has done a work of 3270 Joules on the stalled car as he pushes it a distance of 18m. The car…

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Q: will the power generated by a falling 10 kg object be the same as that generated on a 1.0 kg object…

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Q: A book is being pushed across a horizontal table. Does the normal force pushing up on the book do…

A: A book is being pushed across a horizontal table.

Q: In which situation is work not done? An object is  Question 2 options:   dropped   fired…

A: The objective of the question is to identify the situation in which no work is done on an object…

Q: How far must a 50 N force need to push an object to do 10 J of work? Your answer: 0.2 m 5 m 40 m 60…

A: Here given a force of 50 N. The workdone is 10 J.We have to calculate the distance covered by that…

Q: If the unit of your answer is kg m/s, which of the following types of quantities could your answer…

A: Power = work/time = (F s)/t = (m a s )/t            = (Kg * (m/s2)*m)/s             = Kg m2/s3

Q: Bobby and Michael are competing on bleacher runs. Both runners weight the same. Bobby runs up the…

A: Work done by gravitational forc depends only on initial and final position since gravitational force…

Q: How much work is done on a downhill skier by an average breaking force of 813 newtons to stop her in…

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Q: what is the work in moving object with displacement - 61 + 2 62 - 5 63 (m) force F = 2 61 + 4 82 -…

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Q: Which of the two animals possesses greater kinetic energy in catching their prey: a 120 kg lioness…

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Q: You push your much-loved 3-kg physics book 0.83 m along a horizontal table top with a horizontal…

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Q: A force of 40 Newtons is applied to an object at an angle of 37 degrees from the horizon, displacing…

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Q: What will be the power of a girl who can run with a velocity 4 m/s for 20 seconds. The mass of the…

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Q: A block is pushed across a 10 m rough surface quickly by a boy. Which of the following would not…

A: A block is pushed along a 10 m rough surface very quickly by a boy  Power = WD / time = M×a×x/t  In…

Q: Show that about 786 W of power is expended when a 500-N barbell is lifted 2.2 m above the floor in…

A: The expression for the power is,

Q: Which of the following statements is true?   Work is a Scalar Quantity   Work is positive when the…

A: 1) solution - Yes work is scalar quantity We know that, Work (W)= F.s Where F and s are the vector…

Q: Joule is a unit of the following: work, power, potential energy, and kinetic energy, true or false?

A: Work: Work = Force ×Displacement      W = F ×S Units of work:    1 J = 1 N m   Power: Power = Work…

Q: How much of work (W) is done by a 100 kg firefighter with 65 kg of equipment when climbing a 9 m…

A: The net work done required will be equal to change in fireman's mechanical energy .Since he moves at…

Q: You and your friend Gandalf are mowing lawns for extra spending money. Gandalf pushes his mower 20 m…

A: Given data:  Displacement (d1) = 20 m Force (F1) = 100 N Force (F2) = 40 N The work done by both…

Q: Which of the following examples is NOT "physics work"?

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Q: Bobby and Michael are competing on bleacher runs. Both runners weight the same. Bobby runs up the…

A: Given data:  Both runners weight the same Height of the stairs is same Required: The work done (W)

Q: Which requires more work: lifting a 100-kg sack vertically 5 meters or lifting a 50-kg sack…

A: The given data are: m1=100 kgh1=5 mm2=50 kgh2=12 m