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Work and Power
Page 4
Questions (191)
If a man has an average useful power output of 31 W, what is the minimum time, in s, it would take him to lift fifty 12.3 kg
2 answers
asked by
henry
475 views
how do you calculate the missing variable in work and power;example:you must exert a force of 4.5N on a book to slide it across
1 answer
asked by
jimmy
470 views
A girl pushes a merry-go-round with a force of 120N for a distance of 6.0m.
a) if she does this over a span of 2 seconds, how
1 answer
asked anonymously
28 views
Paul and john have the same mass of 50kg.They both climbed a stairof height 5 meters. Paul climbed the stair in 10 seconds while
1 answer
asked by
Christ
468 views
Note: One horsepower is equal to 746 watts.
An automobile engine delivers 53.1 hp. How much time will it take for the engine to
1 answer
asked by
Kethe
490 views
A 30 kg person climbs up a 5 m rope at a constant speed. If the student’s power output is 2 kW, how long does it take for the
1 answer
asked by
Anonymous
474 views
a man loads 1,000 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
1 answer
asked by
trisha
465 views
The power output of an elevator is 15000 W. How many persons could it carry if it raises passenger to a height of 35 m in 20 s (
1 answer
asked by
HiHello
479 views
A force of 303.0 N is used to push a 160 kg mass 30.0 m horizontally in 3.00 s.
(a) Calculate the work done on the mass. 1 kJ (b)
1 answer
asked by
Anonymous
448 views
Trenton struggled as he lifted a 27kg mass vertically a distance of 9 meters in 4minutes with a constant velocity.
A-how much
3 answers
asked by
Jen
463 views
a 60.0kg boy runs up the stairs of a football stadium to a height of 12m above the ground 15s.what are the work and power
1 answer
asked by
melinda
443 views
A girlwhose mass is40kg wolks up a flight of 20steps each 150mm height in 10seconds calculate the average power dp byag
3 answers
asked by
ILIYASU D,HARUNA
441 views
a 49 newton rock is lifted in 5 seconds A. how much work is done?
B.what power is used? How do you write this question out
1 answer
asked by
gary
449 views
if it takes 20 newtons to move a box, how long will it take a 20 watt motor to move the box 5 meters
1 answer
asked anonymously
11 views
how far will 390 J raise an 8 kg mass?
1 answer
asked by
LanguadeHarts
11 views
Grandma Jones lifts the baby 3m. It took her 20 seconds and she used a force of 70N.How much power was used?
1 answer
asked anonymously
7 views
Sheila lifts a plant in 10 seconds to a height of 2m. She uses a force of 75N.How much power is used
1 answer
asked anonymously
8 views
Bob lifts his cat in 5 seconds to a height of 1.5meters. He uses 50N of force. How much power is used?
1 answer
asked anonymously
8 views
Stockers at a large warehouse hold a competition to see how productive they are. Each stocker must lift ten 50 N cartons to a
1 answer
asked anonymously
22 views
Using 2750 J of work, a toy elevator is raised from the ground floor to the second floor in 25 s. How much power does the
1 answer
asked anonymously
14 views
Using 2750 J of work, a toy elevator is raised from the ground floor to the second floor in 25 s. How much power does the
1 answer
asked anonymously
9 views
If you exert 24 N across a distance of 6 m in 8 s you'll deliver a power of _________________.
You need to list the following:
1 answer
asked anonymously
9 views
You do work on a cart loaded with groceries. If you do this work in one-third the usual time, you spend blank. This is an
1 answer
asked anonymously
22 views
An elephant lifts 300 kg log to a height of 3.0 meters in a time of 4.0 seconds. How much work does she do. How much power is
1 answer
asked anonymously
15 views
alonzo and irina do the same amount of work, but irina takes twice as long. how much power does alonzo have, compared to irina
1 answer
asked anonymously
19 views
A student walks up a hillThe student's friend has the same mass and walks up the same hillbut completes the journey in less
1 answer
asked anonymously
29 views
A student walks up a hillThe student's friend has the same mass and walks up the same hillbut completes the journey in less
1 answer
asked anonymously
23 views
A student walks up a hill. The student’s friend has the same mass and walks up the same hill, but completes the journey in
1 answer
asked anonymously
25 views
A student walks up a hill. The student’s friend has the same mass and walks up the same hill, but completes the journey in
1 answer
asked anonymously
42 views
TIME REMAINING
56:51 During a workout, a football player pushes a blocking dummy a distance of 30 m. While pushing the dummy the
1 answer
asked anonymously
19 views
How much Power does it take to do 125 Joules of work in 2 seconds?
1 answer
asked by
b
7 views
How much time does it take to apply 1800 J of work with a Power of 45 Joules per second?
1 answer
asked by
b
6 views
How much time did it take for you to apply 200 Joules of work with a power of 5.0 Joules per second?
1 answer
asked by
b
9 views
Which statement best describes how work and power are different?
To find work we need to know velocity and distance; to find
1 answer
asked anonymously
18 views
6. a boy lifts the load of 50 kg from the ground to a height of 6 m within a time of 10 minutes. Calculate the work done by the
1 answer
asked by
Dari b
17 views
as part of a training schedule a weightlifter pushes a heavy metal block along the floor. the lifter applies a force of 770N
1 answer
asked anonymously
16 views
Which statement best describes how work and power are different?
Group of answer choices To find work we need to know force and
1 answer
asked by
Ilikecookies2009
10 views
Work and power are different because
Group of answer choices work involves energy and time while power involves force and mass
3 answers
asked by
Ilikecookies2009
12 views
If we increase the amount of work, and all other factors remain the same, the amount of power will
Group of answer choices
1 answer
asked by
Ilikecookies2009
10 views
A mass of 700kg is hoisted vertically at a velocity of 120m. Calculate
The work done per min The power required
1 answer
asked by
Jumbo
5 views
Determine the power output of a 2.0 g bee walking straight up a windowpane at 3.4 cm/s.
• No option is correct 00.67 mW •6.2
1 answer
asked by
Banya
4 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