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Work and Energy
Page 10
Questions (3,237)
A 2 kg box is dropped from an initial height of 10 m. Find the work done on the box.
4 answers
asked by
Michael
786 views
A 1500 W winch is used to raise a load of bricks to a height of 25m. If the bricks need to reach this height in 1.5 minutes.
4 answers
asked by
Masabata
656 views
a delivery person pulls a 20.8 kg box across the floor. the force exerted on the box is 95.6n (35 above the horizontal). the
4 answers
asked by
emma
2,430 views
Calculate the work done on a cyclist if a braking force of 40 N [backward] slows the cyclist from 20 m/s to 15 m/s in 2.0 s.
4 answers
asked by
Yinka
1,051 views
;A 20-N block lifted straight upward by a hand applying a force of 20 N. If the block is lifted 1 m, who much work does the hand
3 answers
asked by
ang
975 views
How much work does a weightlifter do on a 450 N barbell thathe lifts 2m into the air
3 answers
asked by
Emma Roberts
645 views
A force has the dependence Fx(x) = -kx^4 on the displacement x, where the constant k = 20.3 N/m^4. How much work does it take to
4 answers
asked by
Khalid
767 views
You push your physics book 2.20m along a horizontal tabletop with a horizontal push of 2.20N while the opposing force of
3 answers
asked by
JADE C.
871 views
A block of mass 2.5 kg is pushed up against the vertical wall by a force of 60 N acting at 47◦ to the ceiling. The coefficient
3 answers
asked by
Kaylee
1,048 views
A forklift exerts an upward force of 2.00*10^3 N on a box as it moves the box 5.00 m higher. How much work does the forklift do?
4 answers
asked by
Me and I
1,146 views
A car drives 1000 feet on a road that is 8 degrees to the horizontal, as shown in the figure. The car weighs 3400 lb. Thus
4 answers
asked by
Jonny
1,498 views
The object in the figure has a mass of 3.45 kg and is pulled up a slope AB, which is 36 m long; the height BC is 3.00 m. There
4 answers
asked by
kjean
1,379 views
How much work is done by the system when
2.00 moles of O2 expand from a volume of 3.00 liters to a volume of 9.6 liters against a
6 answers
asked by
Gabriella
1,438 views
A scraper is drawn over a tooth 22 times, each time moving a distance of 0.75 cm. The scraper is held against the tooth with a
4 answers
asked by
Mollie
701 views
Issac has to do 1000J of work on a 5kg box, and all the work he did simply went into lifting it above the ground. How high above
3 answers
asked by
Marissa
830 views
A box of mass 7.0kg is accelerated from resr across a floor at a rate of 4.0m/s2 for 5.0s. Find the net work done on the box.
4 answers
asked by
Tally
931 views
Carlos does a chin-up in gym class and raises himself 0.8 m. If Carlos has a mass of 62 kg, how much work does he accomplish?
4 answers
asked by
Carlos
1,730 views
Each time he does one pushup, Jose, who has a mass of 61kg, raises his center of mass by 25 cm. He completes an impressive set
4 answers
asked by
Noah
689 views
Q2. Compare the two different scenarios of getting a heavy bag of cement to a height of 1 meter.
(a) Lifting the bag vertically
4 answers
asked by
MrMrMangohead
340 views
A tired squirrel (mass of 1kg) does push-ups by applying a force to elevate it's center of mass by 5cm. Determine the number of
4 answers
asked by
sorie
3,502 views
A machine with velocity ratio 5 requires 1000J of work o raise a load of 600N through a vertical distance of 1.25m
find i.work
4 answers
asked by
Anonymous
1,177 views
A 275 kg piano slides 4.2 m down a 30° incline and is kept from accelerating by a man who is pushing back on it parallel to the
4 answers
asked by
Naomi
1,047 views
Six identical books, 4.0 cm thick and each with a mass of 0.8kg, lie individually on a flat table.How much work would be needed
4 answers
asked by
Kayla
1,315 views
A 50kg boy runs up the steps to the third floor of height 10.5m in 45s.While at the third floor,the boy drpos a 0.25kg ball and
4 answers
asked by
Anonynous
1,311 views
How much work does a 55-kg person do against gravity in walking up a trail that gains 720 m in elevation?
4 answers
asked by
Ameena
1,132 views
A skateboarder with a mass of 68.6 kg and a speed of 4.92 m/s coasts across a parking lot. After coasting for 35.0 m the
4 answers
asked by
Kennedi
1,329 views
A mechanic pushes a 2520 kg car from rest
to a speed of v , doing 4310 J of work in the process. During this time, the car moves
4 answers
asked by
allan
3,620 views
How long would it take a 4.50-kW motor to raise a 175-kg boiler to a platform 15.0 m
above the floor? Is this correct?
4 answers
asked by
Jay
1,621 views
At a playground, a 19.8 kg child plays on a slide that drops through a height of 2.13 m. The child starts at rest at the top of
4 answers
asked by
mike
2,158 views
A load of 500N is raised 0.2m by a machine in which an effort of 150N moves 1m.What is a) the work done on the load b)the work
5 answers
asked by
Luc
1,041 views
1)How much work is done by a person lifting a 2 kg object from the bottom of a well at a constant speed of 2m/s for 5 s. Is the
4 answers
asked by
Fiona
1,551 views
A 20g plastic ball is moving to the left at 30 m/s. How much work must be done th cause the ball to move to the right at 30 m/s?
4 answers
asked by
nathan
4,582 views
How much work (in Joules) is done when a force of 14 N (Newtons) moves an object 6 meters?
4 answers
asked by
Anonymous
1,720 views
A 51-kg packing crate is pulled with constant speed across a rough floor with a rope that is at an angle of 34.0° above the
5 answers
asked by
Cookies
4,321 views
A 20g particle is moving to the left at 30 m/s. How much net work must be done on the particle to cause it to move to the right
4 answers
asked by
K
4,835 views
If you were to expend 10 Joules of work to push a 1-coulomb charge against an electric field, what would be its voltage with
4 answers
asked by
Christina
2,732 views
A horizontal force of 200 N is applied to a 55 kg cart across a 10 m level surface. If the cart accelerates at 2 m/s^2 then what
5 answers
asked by
april
5,634 views
a 50 kg crate is lifted to a height of 10 meters.
a. how much potential energy does the crate have after being lifted? b. if it
4 answers
asked by
jake
1,218 views
If you roll a 5.0 kg bowling ball down the alley at 10.0 m/s, how much work did you do on the ball?
a). 250 J b). 490 J c). 2500
10 answers
asked by
Tyra J
919 views
A crane does work of 13,500 J with a force of 5200 N to lift a beam. How far can the beam be lifted (in meters)?
4 answers
asked by
Sam
1,022 views
A machine with v.r 5 was used to raise a load of 1.2kg mass through high of 10m. If the workdone to raise the load is 800j find
4 answers
asked by
Joshua
708 views
A weightlifter lifts a weight of 500N from the ground over her head, a distance of 1.8m. How much work has been done to move the
4 answers
asked by
Zihan
1,891 views
What is the average useful power output of a person who does 5.50×106 J of useful work in 6.50 h?
Working at this rate, how long
4 answers
asked by
stephanie
3,263 views
A spring loaded ballistic pendulum gun requires an increasing force to load. When loading a ball of mass 0.054 kg, the spring is
4 answers
asked by
Emily
1,162 views
A block of mass m = 5.90 kg is released from rest from point circled A and slides on the frictionless track shown in the figure
3 answers
asked by
mark
921 views
A 4.17 g bullet moving at 506.1 m/s penetrates
a tree trunk to a depth of 4.64 cm. a) Use work and energy considerations to find
4 answers
asked by
Madi
2,985 views
while rowing in a race, john uses his arms to exert a force of 165 N per stroke while pulling the .80 m. how much work does he
4 answers
asked by
Anonymous
3,749 views
A 50-kg box is being pushed a distance of 7.1 m across the floor by a force whose magnitude is 175 N. The force is parallel to
3 answers
asked by
Anonymous
556 views
Pete slides a crate up a ramp at an angle of 25◦ by exerting a 290 N force parallel to the ramp. The crate moves at a constant
4 answers
asked by
andres
1,182 views
Part 1) The block in the figure is initially at rest on an inclined plane at the equilibrium position that it would have if
3 answers
asked by
Hunter
593 views
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