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Work and Energy
Page 6
Questions (3,219)
A machine has a work output of 900Joules.If the work input to the machine was 1800 Joules calculate it's efficiency
3 answers
asked by
Anonymous
920 views
A pump is required to raise 600 litres of fresh water a vertical distance of 120m. If the efficiency of the pump is
45%, how much
3 answers
asked by
Sam
167 views
Suppose an ideal car jack has an input work 2750 J. It lifts a car 0.35 meters in 8 seconds.
a. What is the output work of the
4 answers
asked by
Anthony
1,997 views
A 10.0 kg cart and a 15 kg cart are locked together with a compressed spring between them. They are then released so that the
3 answers
asked by
joseph
1,748 views
A tank is full of water. Find the work W required to pump the water out of the spout. (Use 9.8 for g and 3.14 for π. If you
3 answers
asked by
Liz
1,992 views
Water is pulled up from a well in a bucket on a rope . The rope wind on a cylindrical drum of diameter 14cm. It takes 31 turns
2 answers
asked by
Agyemang
621 views
Diego pulls a 4.5 kg sled across level snow with a force, F, of 230 N on a rope that is 35.0° above the horizontal. If the sled
4 answers
asked by
DONIA
5,200 views
A 60 kg woman climbs a flight of stairs 5,0 m high how much work is required
4 answers
asked by
Ongezwa
1,267 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
4 answers
asked by
I suk at school
924 views
You lift a cat with a force of 40 N up to a table that is 0.5 m high. How much work did you do?
A. 80 J B. 10 J C. 40 J D. 20 J
9 answers
asked by
HELP!!!!!!!!!!
1,088 views
A trough is 5 meters long, 1 meters wide, and 4 meters deep. The vertical cross-section of the trough parallel to an end is
4 answers
asked by
Cait
3,722 views
A horse with a force of 50 N pulls a cart of wood a distance of 10 m. Calculate the amount of work done.
5 answers
asked by
George perez
1,544 views
A 136-lb. student races up stairs with a vertical height of 4.8 m in 6.0 s to get to a class on the second floor. How much power
4 answers
asked by
Liz
1,907 views
How much work (in joules) is done in moving a charge of 2.5μC a distance of 35 cm along an equipotential at 12~V?
4 answers
asked by
Mike
1,481 views
Water is taken from a well 11m deep in a bucket,the rope winding up to a drum 35cm in diameter.
A)Through what angle does the
9 answers
asked by
james
2,763 views
Water skiers often ride to one side of the center line of a boat, as shown in the figure . In this case, the ski boat is
4 answers
asked by
Brena
4,798 views
A stone of mass 10kg fall from the height of 2m.calculate the workdone
5 answers
asked by
dayo
1,422 views
Starting from rest at a height equal to the radius of the circular track, a block of mass 25 kg slides down a quarter circular
4 answers
asked by
Bob
2,301 views
If you do 600J of work hoisting a 20kg bale of hay, to what height did you lift
5 answers
asked by
Lo
1,160 views
A box weighing 30 N is pushed a distance of 5 meters. How much work was done?
4 answers
asked by
Anonymous
2,659 views
A kid applies a force of 70 N to a ball over 1.1 meters. How much work did he do on the ball?
5 answers
asked by
brittany
3,739 views
a 3 kg block slides down a frictionless plane inclined 20 degrees to the horizontal. If the length of the plane's surface is
5 answers
asked by
mandy
4,074 views
Victoria pushes a box. She applies a force of 200 newtons, and she pushes the box for a distance of 10 meters. After she stops
4 answers
asked by
EzioTheTrue
172 views
In a shipping yard, a crane operator attaches a cable to a 1130-kg shipping container and then uses the crane to lift the
4 answers
asked by
ANdy
1,618 views
The efficiency of a machine is 60℅. Calculate the work done by a student who used this machine to lift a load of 150kg through
12 answers
asked by
Asamoah
2,063 views
A 7453 N piano is to be pushed up a(n) 4.04 m frictionless plank that makes an angle of 25.9� with the horizontal.
Calculate the
4 answers
asked by
Charles
3,849 views
A man whose mass is 25kg ran up a flight of 25 steps each 20cm height how much work did they man do?.
4 answers
asked by
Anonymous
439 views
find the force required to do 25 joule work when force causes displacement of 0.5m
5 answers
asked by
Amrit nauny
2,488 views
can you please help me with this please. thank you.
A small mass m hangs at rest from a vertical rope of length l that is fixed
4 answers
asked by
emmiie
2,104 views
A large statue in a crate is being moved. The mass of the statue and the crate is 150 kg. As the statue slides down a ramp
6 answers
asked by
Maddy
5,502 views
A mass m1 = 3.3 kg rests on a frictionless table and connected by a massless string over a massless pulley to another mass m2 =
5 answers
asked by
David
11,518 views
Starting from rest, a 2.1x10-4 kg flea springs straight upward. While the flea is pushing off from the ground, the ground exerts
5 answers
asked by
Anonymous
6,792 views
A 15.2 kg block dragged over rough horizontal surface by constant force of 124N acting at an angle of 34.9 degrees above the
4 answers
asked by
jay
11,876 views
A block of mass 4 kg, which has an initial
speed of 2 m/s at time t = 0, slides on a horizontal surface. Find the magnitude of
6 answers
asked by
Madi
8,733 views
A force F~ = Fx ˆı + Fy ˆ acts on a particle that
undergoes a displacement of ~s = sx ˆı + sy ˆ where Fx = 6 N, Fy =
4 answers
asked by
Isaac Herrera
4,043 views
A 54.5-kg skateboarder starts out with a speed of 1.95 m/s. He does +80.0 J of work on himself by pushing with his feet against
5 answers
asked by
Lola
4,448 views
Suppose that 1100 j of work is done by the force 30 n in moving the suitcase a distance of 50 m. At what angle is the force
4 answers
asked by
Justin
6,808 views
A total of 8.0 joules of work is done when a constant horizontal force of 2.0 newtons to the left is used to push a 3.0 kilogram
5 answers
asked by
Steven
4,175 views
A jack exerts a vertical force of 4.5 x 10^ 3 newtons to raise a car 0.25 meter. How much work is done by the jack?
6 answers
asked by
Priscilla
6,200 views
Please see if I am doing this problem right.
A mixture of gasoline vapor and air is placed in an engine cylinder. The piston has
5 answers
asked by
Anonymous
5,761 views
How many watts of power do you expend when you exert a force of 0.50N that moves a book 2.1m in a time interval of 1.1s ?
Express
4 answers
asked by
Anonymous
4,461 views
The brakes of a truck cause it to slow down by applying a retarding force of 8740 N to the truck over a distance of 1130 m. What
4 answers
asked by
Emily
7,764 views
A person is riding on a Ferris wheel of radius R. He starts at the lowest point of the wheel. When the wheel makes one complete
4 answers
asked by
Amy
4,249 views
A cart loaded with bricks has a total mass
of 18 kg and is pulled at constant speed by a rope. The rope is inclined at 30.4 �
5 answers
asked by
phys1!
7,773 views
A cable exerts a constant upward tension of magnitude 1.82 ✕ 104 N on a 1.60 ✕ 103 kg elevator as it rises through a
5 answers
asked by
Anonymous
9,773 views
A 4.20-kg watermelon is dropped from rest from the roof of a 28.0-m -tall building and feels no appreciable air resistance.
5 answers
asked by
clariza gonzalez
9,437 views
A constant horizontal pull of 8.25 N drags a box along a horizontal floor through a distance of 19.1 m.
Q How much work does the
4 answers
asked by
nancy
2,180 views
skier of mass 79 kg is pulled up a slope by a motor-driven cable.
(a) How much work is required to pull him 80 m up a 30° slope
4 answers
asked by
Muriel
3,450 views
An ideal spring with a force constant (spring constant) of 15 N/m is initially compressed by 3.0 cm from its uncompressed
5 answers
asked by
Anonymous
9,221 views
A horse is towing a canal boat, the tow rope making an angle of 10 o with the tow path. If the tension
in the rope is 20N, how
4 answers
asked by
jerome oca
2,690 views
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