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Work and Power
Page 2
Questions (191)
A motor outputs power of 500 watts and is used to raise a 5kg mass vertically at
constant speed. How long in seconds does it take
3 answers
asked by
Anonymous
789 views
A jogger with a mass of 66.0 kg reaches the top of a staircase in 44.0 s. If the distance from the bottom to the top of the
10 answers
asked by
eli
1,521 views
A chair lift takes skiers to the top of a mountain that is 320 m high. The average mass of skiers complete with equipment is 85
3 answers
asked by
Melissa
1,181 views
Trying to find the power to this ?. A weightlifter lifts a 1250-n barbell 2meters in 3seconds. How much power was used to lift
4 answers
asked by
Liam
677 views
I have been working on this problem all day and i just cant get the answer. Please help I would really appretiate it.
The
3 answers
asked by
Mandy
507 views
a 49 newton rockis lifted 2meters in 5 seconds
How much work is done? b what power is used?
4 answers
asked by
Barb
2,030 views
Two girls each carry a box up to the fourth floor of a building. The total mass of each girl and the box she is carrying is the
1 answer
asked by
A
142 views
a boy whose weight is 600 N runs up a flight of stairs 10 m high in 12 second .What is his average power?
1 answer
asked by
Anonymous
254 views
An elephant applies a force of 5000 N through a rope on a bundle of wood logs and moves them through a displacement of 250 m.
2 answers
asked by
Alexandria
615 views
A man loads 1,000 sacks of flour into a truck in 30 minutes. each sack has a mass of 20 kg and the man must lift each sack 1.00
1 answer
asked by
Michelle
437 views
A man loads 1000 sacks of flour into a truck in 30.0 minutes. Each sack has a mass of 20.0kg and the man must lift each sack
2 answers
asked by
Troy Stuart
518 views
A ramp is 2.8 meters long and 1.2 meters high. How much power is needed to push a box up the ramp in 4.6 seconds with a force of
3 answers
asked by
Bob cx
863 views
What is your average power if you lift a 33.8 kg box at a constant speed to a height of 3.27 m in 6.10 s?
2 answers
asked by
HP
504 views
It takes 16s to raise a 2800lb car and the supporting 650lb hydraulic car-lift platform to a ht of 6.5 ft. Knowing that the
2 answers
asked by
Amelia
519 views
Paul pulls a stalled car with a rope 493-m with a force of 267-N, calculate the powered generated by Paul after 9 minutes
1 answer
asked by
Lauren
400 views
. Show that 480 W of power is expended by a weightlifter when lifting a 60-kg barbell a vertical distance of 1.2 m in a time
1 answer
asked by
merle
454 views
A boy weighing 350Newton runs up a flight of stairs consisting of 20 stairs each, 16 centimeter high in seconds, what ??$ it's
3 answers
asked by
yemi
638 views
The power developed by a man in riding up a 6 percent grade at a constant speed is 200 w. The man and his bicycle have a
3 answers
asked by
Dhilsath
1,048 views
A motor lifts a 70.0 kg box off the ground, starting from rest. In 8.00 seconds it lifts the box to a height of 20.0 m. At that
4 answers
asked by
Kate
477 views
Consider the two situations. In the first a machine must pull a box up a rough slope at constant speed. The mass of the box is
2 answers
asked by
Cody
995 views
Hello, this is the last question that I can't seem to or be able to solve:
1. Jenny (75 kg) goes on a ski trip. She goes down a
1 answer
asked by
Physics
382 views
Had The Same Teacher For Physics And Ughh I Am Stuck. Notes Help Me A Lot So If Anyone Could Write A Few Or A Bunch Out That
2 answers
asked by
Fizzylicous
572 views
How long would it take a 20.0 hp motor to lift a 1,000.0 kg crate from the bottom of a freighter's hold to the deck (40.0 m)?
2 answers
asked by
t
742 views
A box is pushed across the floor against a constant frictional force. The box is pushed across the room to the east in 30
3 answers
asked by
Casey
1,416 views
A climber pulls herself 8 meters upwards with a force of 150 Newtons. If it takes her 16 seconds to cover the 8 meters, how much
4 answers
asked by
Anonymous
580 views
A 315 kg object is lifted 12 meters by a motor in 15 seconds. How much power does the motor deliver?
1 answer
asked by
Anonymous
372 views
A force of 48 N pushes a 2 kg object initially at rest a distance of 3m along frictionless horizontally surface. Find:
A- The
2 answers
asked by
Mota
502 views
Two people who weigh the same climb a flight of stairs. The first person climbs thestairs in 30s, while the second person climbs
3 answers
asked by
Shevon
1,120 views
A motor does 25,000 J of work in 250 seconds. What is the power produced?
1 answer
asked by
Sammi
392 views
If it took 5 seconds to lift the crate, using a machine what was the power rating of the machine?
1 answer
asked by
Rosemary
408 views
A cable pulls a crate of mass 19.0 kg across the floor in 6.8 s. If the total distance traveled is 5.40 m, find the power used
1 answer
asked by
Jon
376 views
What formula's do I use to solve these problems?
A 1.04x10^3 kg car accelerates uniformly from rest to 12 m/s in 2.16 seconds. a)
1 answer
asked by
Christy
376 views
Two people who weigh the same climb a flight of stairs. The first person climbs the stairs in 30 s, while the second person
3 answers
asked by
Rachel
1,114 views
If my older brother lifts a rock 6 ft in the air and in rock weighs 100 lbs, if It took him 2 seconds to lift the rock how much
3 answers
asked anonymously
37 views
A machine carries a 5.0 kg package from an initial position of di = (0.50 m) i + (0.75 m) j + (0.20 m) k at t = 0 to a final
1 answer
asked by
Technoboi11
555 views
An elevator lifts a total mass of 1.1 x 10^3 kg, a distance of 40 m in 12.5s. How much power does the elevator demonstrate?
3 answers
asked by
Taylor
4,103 views
A 79-kg sprinter accelerates from rest to a speed of 11.0 m/s in 4.8 s.
(a) Calculate the mechanical work done by the sprinter
3 answers
asked by
Annette
2,283 views
A woman pushes a lawn mower with a con-
stant force of 112 Newtons at an angle of 37degrees with respect to the horizontal. The
3 answers
asked by
James
2,270 views
A skier of mass 70 kg is pulled up a slope by a motor-driven cable. (a) How much work is required to pull him 60m up a 30 degree
4 answers
asked by
Kelly
2,042 views
A man pushes a lawn mower on a level lawn with a force of 200N it 40% of this force is directed downward how much woek is done
3 answers
asked by
Isis
1,709 views
a pulley is used to lift a mass with a force of 900N to a height of 10 metres in 2 minutes.find the work done by the force and
6 answers
asked by
krishna
1,504 views
A force of 5.0 N acts on a 15 kg body initially at rest. Compute the work done by the force in (a) the first,(b) the second, and
3 answers
asked by
Hammad
1,519 views
How long would it take for a motor with 0.50 kW of power to do 1200 J of work?
1 answer
asked anonymously
9 views
A body whose mass is 40kg runs up a flight of 30steps each 150mm high in 6seconds find the average power developed (take
4 answers
asked by
Anonymous
1,340 views
A box that weighs 725 N is lifted a distance of 20.0 m straight up by a cable attached to a motor. The job is done in 6.5 s.
2 answers
asked by
Anonymous
1,301 views
a box pushed across the floor for a dis tance of 5 meters with a force of 50 newtons in 5 second
how much work is done? what is
1 answer
asked by
sherrie
1,100 views
An escalator in a department store is driven by a large electric motor whose power consumption changes with the load to keep the
2 answers
asked by
micky
1,121 views
If a machine is doing 500 J of work with 75 watts of power, how long did it take to complete its task? (Round your answer to the
2 answers
asked by
Anonymous
1,111 views
A 5.50 kg cat leaps from the floor to the top of a 94.0-cm-high table. If the cat pushes against the floor for 0.220 s to
2 answers
asked by
Zach
1,057 views
Calculate the work and power done when a track athlete lifts a 20 kg barbell 0.6 meters in 0.8 seconds.
2 answers
asked by
anna
1,069 views
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Parent Categories (12)
Dynamics
Energy
Energy and Power
Force and Motion
Forces
Forces and Motion
Mechanics
Mechanics and Motion
Mechanics/Physical Forces
Physical Science
Physics
Work and Energy