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Work and Energy
Page 2
Questions (3,219)
a stone of mass 10kg falls from a height of 2m calculate the workdone
9 answers
asked by
ola
2,145 views
how much work is done if a force of 12N moves an object a distance of 5m
5 answers
asked by
princess
2,879 views
In loading a lorry a man lifts boxes each of weight 100N throughta height of 1.5 m. a)how much work does he do in lifting 1 box
7 answers
asked by
Luc
4,031 views
When a force of 50N is applied to the free end of an elastic cord, an extension of 4cm is produced. Calculate the work done on
4 answers
asked by
Joshua
805 views
Calculate the work done by the effort and the effort applied when a system of 6polley is used to raise a load of 600N through a
5 answers
asked by
Miracle
1,428 views
A rain cloud contains 2.66 x 10^7 kg of water vapor. How long will it take for a 2.00 kW pump to raise the same amount of water
5 answers
asked by
arriell
3,255 views
A circular swimming pool has a diameter of 14 m, the sides are 4 m high, and the depth of the water is 3.5 m. (The acceleration
4 answers
asked by
Anonymous
4,589 views
A girl whose weight is 30 N runs up a flight of stairs 5 m in 6 s. What is her average power
5 answers
asked by
Favour
1,277 views
A spring with a tension of 200N/mm is compressed for a distance of 150mm.
Determine the Work done if the spring is compressed a
4 answers
asked by
Pearl
547 views
A force of 12N acts at a distance of 12m in the force direction.find the work done?
4 answers
asked by
Orpia janna mae
146 views
1)An electron moved from point A to point B along an equipotential surface.
a)the eclectron performs work in moving from point A
4 answers
asked by
Andrea
1,475 views
A girl of mass 50kg runs up a flight of stairs.After 10 minutes she is 250 metres above the ground. Determine her average power
3 answers
asked by
Bafana
1,038 views
A soccer player kicks a ball, applying a force of 1,000 newtons over a distance of 0.2 meter. The ball travels 50 meters down
1 answer
asked by
scienze
71 views
A machine’s efficiency is determined to be 60%. The input work is 3,000 joules. What is the output work?(1 point) Responses
1 answer
asked anonymously
25 views
A lawn mower is pushed a distance of 100 ft. along a horizontal path by a constant force of 60 lbs. The handle of the lawn mower
4 answers
asked by
mynameisundefined
4,042 views
1. In moving an object of mass 10 kg through a distance of 8.0 m, 40 J of work is done. The average force exerted is?
my answer:
45 answers
asked by
Lisa
3,722 views
an escalator carries you from one level to the next in the airport terminal. the upper level is 4.5 m above the lower level, and
5 answers
asked by
HP
6,778 views
A 2.20 kg pendulum starts from a height of 5.00m. It swings back and forth through one whole oscillation but only returns to a
4 answers
asked by
Tyger2020
2,182 views
A boy weighing 350N runs up a flight of stairs consisting of 20 steps each 10 cm high in 10 seconds.what is his power?
7 answers
asked by
CHIDI
2,596 views
Use the table to answer the question.
Machine Output Work (J) Input Work (J) A 750 1,500 B 1,000 4,000 C 450 600 D 3,000 5,000
7 answers
asked by
IWannaBeADawg
201 views
A force of 400.0 N is exerted on a 1,250 N car while moving it a distance of 3.0 m. How much work was done on the car?
5 answers
asked by
Misty T
3,504 views
A ski patroller pulls a rescue toboggan across a flat snow surface by exerting a force of 45 pounds on a handle that makes an
4 answers
asked by
Anonymous
2,831 views
3. You push your physics book 1.50 m along a horizontal table- top with a horizontal push of 2.40 N while the opposing force of
5 answers
asked by
Anonymous
13,474 views
A ramp leading up to a loading platform is 3 m long and 1 m high at its highest point. If the friction is ignored, what work is
4 answers
asked by
Dani
2,293 views
A 45 kg car is pulled at a constant speed across a rough horizontal road by a rope at an angle of 29.5o above horizontal. How
2 answers
asked by
Deadrea
135 views
A crane lifts a 100-kg concrete block to a vertical height of 25 m. Determine the work done by the crane.
5 answers
asked by
rayyan
2,453 views
A skateboarder with mass ms = 42 kg is standing at the top of a ramp which is hy = 3.7 m above the ground. The skateboarder then
4 answers
asked by
carlo
9,696 views
A 80 kg firefighter climbs flight of stairs 6 meter high in 10 seconds.
How much work is required by the firefighter?
5 answers
asked by
andro
3,648 views
a force used to lift a 12-kilogram mass to a height fo 8 meters in 2 seconds does 1040 joules of work. how much force is used.
5 answers
asked by
reba
1,684 views
a person in a wheelchair with a total mass of 100 kg is pushed from rest to a speed of 2.0m/s. if the effective coefficient of
4 answers
asked by
masi
1,320 views
a small rock with mass 0.20 kg is released from rest at point A which is at the top edge of a large, hemispherical bowl with
5 answers
asked by
Frankie
19,126 views
When a block slides a certain distance down an incline the work done by gravity is 300 J. What is the work done by gravity if
6 answers
asked by
Tammy
9,488 views
An escalator carries 60 people of average mass 70 kg to a height of 5m in one minute.Find the power needed to do this.
6 answers
asked by
Sarah
4,149 views
A force F⃗ = 12 N i^ − 10 N j^ acts on an object. How much work does this force do as the object moves from the origin to
5 answers
asked by
kolam
9,204 views
A gas absorbs 45 kJ of heat and does 29 kJ of work. Calculate the change in energy.
The answer is 16 kJ, but I don't understand
6 answers
asked by
Jake
7,817 views
An object of mass 50kg is placed on inclined plane at an angle of 30 degrees to the horizontal. The height of the plane is 250cm
7 answers
asked by
wilfred nder
3,399 views
When a particle located a distance x feet from the origin, a force of x^2+2x pounds acts on it. How much work is done in moving
4 answers
asked by
Anonymous
3,630 views
A cylinder within a piston expands from a volume of 1.00 L to a volume of 5.50 L against an external pressure of 4.50 atm.
Part A
5 answers
asked by
lea
1,398 views
Under constant pressure, a system of gases is sealed in a cylinder and then allowed to expand. What can you conclude about the
11 answers
asked by
jessie
3,431 views
As shown in the figure below, a skateboarder starts at point A on the ramp and rises to point B, a maximum height of h = 2.89 m
5 answers
asked by
Anonymous
7,124 views
A 50-kg box is being pushed a distance of 6.4 m across the floor by a force P with arrow whose magnitude is 154 N. The force P
4 answers
asked by
Lola
7,627 views
A car and driver weighing 7750 N passes a sign stating “Bridge Out 28.5 m Ahead.” She slams on the brakes, and the car
4 answers
asked by
Kaylee
5,483 views
A student pushes against a large maple tree with a force of magnitude 250 N. How much work does the student do on the tree?
would
5 answers
asked by
frell
1,722 views
A Petrol Engine Raises 200litres Of Water In A Well From A Depth Of 7m In 6 Sec.What Is The Power Of The Engine?
6 answers
asked by
Abe
2,337 views
find the work done in winding up a 175 ft cable that weighs 4.00 lb/ft?
5 answers
asked by
seth
4,472 views
What is the average power output of a weightlifter who can lift 260 kg to a height of 1.9 m in 1.8 seconds?
5 answers
asked by
Ash
6,655 views
A 17.0 kg crate is pulled a distance of 20.0 m requiring that 1210 Joules of work be done. If the job is done by attaching a
4 answers
asked by
Liam
3,117 views
Part 1
A 3.0 kg block is pushed 3.0 m at a constant velocity up a vertical wall by a constant force applied at an angle of 30.0
5 answers
asked by
ally
4,290 views
A helicopter, starting from rest, accelerates straight up from the roof of a hospital. The lifting force does work in raising
5 answers
asked by
Nikki
4,040 views
A machine of efficiency 80% is used to raise a load of body of mass 75kg through a vertical height of 3m in 30seconds.Calculate
7 answers
asked by
Angela
4,896 views
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