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Work and Energy
Page 4
Questions (3,219)
Calculate the time taken by a water pump of power 500 W to lift 2000 kg of water
to a tank, which is at a height of 15 m from the
5 answers
asked by
Ryan
2,663 views
A satellite in a circular orbit around earth with a radius 1.019 times the mean radius of the earth is hit by an incoming
2 answers
asked by
Andy
863 views
Two workers are loading crates onto a pick up truck. Worker 1 lifts his crate straight up from the ground to the truck. Worker 2
2 answers
asked by
matt
648 views
If you hit a soccer ball with a force of 38 N and the soccer ball travels 12 meters, what is the amount of work you have done?
An
1 answer
asked by
kali
106 views
A force acting on an object does NO work if:
a the force is greater than the force of friction b a machine is used to move the
1 answer
asked by
A
137 views
A box is pushed with a force of 15n. If the box moved 3 meters, how much work was done on the box?
help pls
1 answer
asked by
kendalll
151 views
A block and tackle system of 5 pulley is used to raise a load of 500N steady through a height of 20m the work done against
13 answers
asked by
Mamoeletsi
6,270 views
Adam lifts a book from the floor, carries it across the room, and places it on a high shelf. When is Adam doing work on the
2 answers
asked by
A
211 views
Tito and Michael put 1200 joules of work into pushing a box up a ramp, but only 300 joules of work is output for moving the box.
4 answers
asked by
X
138 views
A gardener uses a wheelbarrow to move 20 kilograms of soil from a compost pile to a flower bed, a distance of 53 meters. The
2 answers
asked by
the real BARNY THE DINO :)
285 views
1. A 25 kg crate is pulled at constant speed a distance d = 5.7 m up a frictionless ramp to a height h of 2.5 m above its
1 answer
asked by
jo
188 views
A person weighing 50kg runs up a hill raising himself vertically 10m in 20sec. Calculate the power of the person.
4 answers
asked by
M.DAVINSI
1,841 views
If W=F×d, which of the following equations shows work being calculated using the correct units?(1 point)
Responses 113 N=(17.4
4 answers
asked by
Kells
348 views
The water skier in the figure is at an angle of 35degree with respect to the center line of the boat, and is being pulled at a
7 answers
asked by
JU
3,482 views
brutus, a champion weightlifter, raises 240 kg a distance of 2.35 m. How much work is done by Brutus lifting the weights?
3 answers
asked by
sierra
2,184 views
do i have the following answer right?
a tv set is pushed a distance of 2m with a force of 20 N that is in the same direction as
3 answers
asked by
Soly
2,118 views
A grocer lifts an 8.0-kg carton from the floor to a height of 0.80 m in 5 sec. Calculate the power of man.
2 answers
asked by
Mota
624 views
A small motor runs a lift that raises aload of bricks weighing 836N to a height of 10.7m in 23.2s. assuming that the bricks are
5 answers
asked by
Cody
3,953 views
Grant stands 3 meters from the check out at the grocery store holding a 20N bag of potatoes for 10 minutes. How much work does
6 answers
asked by
Chloe
1,756 views
A river does 6,500 j of work on a water wheel every second. The wheel efficiency is 12%.
A. How much work in joules can the axle
3 answers
asked by
Aurora Simmons
1,102 views
A sledge loaded with bricks has a total mass of 18.0 kg nd is plled at constant speed of a rope incllined at 20 degres above the
4 answers
asked by
dom
1,707 views
A girl of mass 60kg runs up a flight of 20 steps each of 0.5m high in 10sec.find the average power developed (g=10m/s^2
4 answers
asked anonymously
137 views
a tractor is towing a large trailer on a horizontal road at a constant speed of 15 km/h. The mass of the is 1,3 t and the mass
2 answers
asked by
Anonymous
143 views
A man of mass of 80kg carries a load of bricks of mass 20kg up a vertical ladder of length 6m.what work has he done?
2 answers
asked by
Divine
185 views
A steel block weighing 12N is pulled up an incline plane 20° above the horizontal by a constant force of 7.35 N which makes an
2 answers
asked anonymously
143 views
A gardener moves 5 kilograms bag of soil at an average acceleration rate of 4 m/s to her flower bed, a distance of 5 meters. How
2 answers
asked by
Vanilla-
63 views
A gardener moves 5 kilograms bag of soil at an average acceleration rate of 4 m / s to her flower bed , a distance of 5 meters .
2 answers
asked by
O
95 views
On a hot, summer day you put both of your hands on a 420-Kg yellow fire hydrant. This is attached properly to an underground
2 answers
asked anonymously
181 views
On a hot, summer day you put both of your hands on a 420-Kg yellow fire hydrant. This is attached properly to an underground
2 answers
asked anonymously
214 views
A baseball pitcher throws a 250g baseball to make it accelerate to 50 m/s the instant that it leaves his hand. How much energy
2 answers
asked anonymously
128 views
A truck pulls a trailer at 75 km/h and exerts a uniform tension force of 800N on the trailer how to calculate the work done in
2 answers
asked by
Prudence
86 views
In physics, work happens when energy is transferred in a way that causes an object to move. Which example below is an example of
2 answers
asked by
Help The Science Kid🌍🌾😔
105 views
The internal energy ∆E of a system is -230 kJ. If the system released 300 kJ, How much work was done in the system? Based on
2 answers
asked by
ezile
130 views
If a system pulley has a velocity ratio of 6 and mechanical advantage of 5 the system is used to raise a load of 3000N through
2 answers
asked by
Bruk
107 views
A system of pulley has a velocity ratio of 6 and mechanical advantage of 5 the system is used to raise a load of 3000N through
2 answers
asked by
Bruk
87 views
A 50 kg object is moving under the action of a force along a horizontal floor at a constant speed of 4m/s. If the cofficient of
2 answers
asked by
Bruk
69 views
A group of students were setting up their school auditorium for a rock concert to be held over the weekend.
The students used a
1 answer
asked by
A
84 views
A group of students were setting up their school auditorium for a rock concert to be held over the weekend.
The students used a
2 answers
asked anonymously
93 views
If you use a 40 N force to lift a bag, and do 20 J of work, how far do you lift it?
2 answers
asked anonymously
50 views
A group of students were setting up their school auditorium for a rock concert to be held over the weekend.
The students used a
1 answer
asked by
kali
92 views
In an attempt to exercise more, Ms. Jang runs up the stairs at a constant speed. She climbs to the top of a building with a
2 answers
asked anonymously
87 views
What is the equation for work?
a None of the above b W = m * a c W = F/d d W = F * d
1 answer
asked by
kali
85 views
Darla pushed a cart with 50 newtons of force 100 meters away from her house. How much work, measured in joules (J), did she do
1 answer
asked by
kali
102 views
Tito and Michael put 1200 joules of work into pushing a box up a ramp, but only 300 joules of work is output for moving the box.
1 answer
asked by
kali
163 views
Use the table to answer the question.
Machine Output (J) Efficiency (%) A 750 60 B 1,000 40 C 450 30 D 3,000 75 A manufacturer is
1 answer
asked by
oof
139 views
What is the name for the rate at which work is done?
a. energy b. joules c.newton-meters d.watts
1 answer
asked by
christinaqz
79 views
Aidan lifts a box from the floor, carries it across the room, and places it on a high shelf. When is Aidan doing work on the
3 answers
asked by
no name
144 views
the power of an engine is the derivative of the work that it performs with respect to time. suppose an engine outputs work
1 answer
asked by
D
84 views
A force acting on an object does NO work if:
a the force is greater than the force of friction b the object accelerates c the
1 answer
asked by
no name
93 views
Q. a 2.0 kg block is placed against a spring of force constant 800 N/m, which has been compressed 0.15m. The spring is released,
3 answers
asked by
Ring
834 views
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