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: From your learnings in kinematics and dynamics, what do you think causes work?

A: We have to comment on what causes work to be done.

Q: The question "What is the change in the kinetic energy of the car?" was not solved correctly, is…

A: Given data: Mass of the car, m=1310 kg Initial velocity of the car, vi=79 km/hr=793.6=21.94 m/s…

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

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Q: A boy carrying a bag on his shoulders walking at angle of 90 degrees does any work or not?

A: Given : A boy carrying a bag on his shoulders walking at an angle of 90 degrees. We know that the…

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: A car speeds up from 10.0 m/s to 30.0 m/s in 3.0s. What is it’s acceleration? Please show the work,…

A: Initial velocity is Final velocity is Time is Find:Acceleration of the vehicle.

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: How many slices of bread did each climber have to eat to compensate for the increase of the…

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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: A 62 kg woman jogs up a hill in 18 s. Calculate the power the woman exerts if the hill is 24 m high.

A: Mass of the person is m=62 kg Time is t=18 s Height of hill is h=24 m Note: 1 N=1 kg·m/s2 1 J=1Nm…

Q: Energy can neither be created nor be destroyed. Then what happens to the energy spent against…

A: Friction is simply energy being converted into heat energy. So all the energy spent overcoming…

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: (a) The Eskimo pushes the same 50.0-kg sled over level ground with a force of 1.95 x 10 N exerted…

A: Given: Mass of sled = 50 kg Force, F = 1.95 X 102 N Distance, s = 6.85 m Net work done = 2.6 X 102 J…

Q: Name the form of energy which a body possess even when it is not in motion. Give an example to…

A: The energy a body possess even when it is not in motion is potential energy. Body can have some…

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: If your friend pushes a lawnmower 4 times as far as you do while exerting only half the force, which…

A: The work is force times distance. Your friend uses a half of the force but goes four times as far.…

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: Problem 12.4 An 20-cm-long bicycle crank arm, with a pedal at one end, is attached to a…

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Q: if you pull a wagon with a force of 200 Newton's and it takes you 20 seconds to pull it 10 meters of…

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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…

A:

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 man of mass 60.0 kg takes 4 seconds to run up a 4-m high stairs. Which of the following gives the…

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Q: Your humble physics Professor elevates a ball hanging from a string away from it's lowest position…

A: The ball is tied by the string, such that it is initially left hanging. The weight of the ball or…

Q: A man pushes very hard for several seconds on a heavy rock, but the rock does not budge. Has the man…

A: To determine Work done by the man

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)