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Work and Energy
Page 3
Questions (3,219)
A 5.3-kg block is pushed 2.3 m up a vertical wall with constant speed by a constant force of magnitude F applied at an angle of
4 answers
asked by
sherry
7,594 views
If a 65 kilogram load was raised 6 meters in 60 seconds determine the minimum rated wattage of the motor needed to accomplish
5 answers
asked by
Joe
1,568 views
A tired squirrel of mass 1kg does push ups by applying a force to elevate it’s centre of mass by 5cm as shown in the following
3 answers
asked by
Ram
791 views
How much work is done by the force F⃗ =(− 3.0 i^− 7.6 j^)N on a particle that moves through displacement Δr⃗ = 3.6
4 answers
asked by
Trevor
3,516 views
A 62kg cyclist changes the speed of a 12kg bicycle from 8.2m/s to 12.7m/s. Determine the work done.
Not sure how to start ! Do I
4 answers
asked by
A
1,470 views
you lift a chair that weighs 50 n to a height of 0.5cm and carry it 10 m across the room how much work do you do on the chair.
I
4 answers
asked by
Hamza
2,289 views
a river does 6500J of work on a water wheel every second.The wheels efficiency is 12 percent.A)How much work in joules can the
5 answers
asked by
kayla
3,054 views
A 20.0-kg crate sits at rest at the bottom of a 13.5 m -long ramp that is inclined at 40 ∘ above the horizontal. A constant
4 answers
asked by
Kallian
4,059 views
An Effort Of 250N Raises A Load Of 1000N Through 5m In A Pulley System.If The Effort Moves 30m,what Is; (a)the Work Done In
5 answers
asked by
mr.m
1,190 views
Calculate the power of a pump which lifts 500kg of water through a vertical height of 4m in 5sec (assuming g=10m/s^2).
4 answers
asked by
...Mas'ud S. Yusuf#
944 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
1,496 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
1,306 views
A student eats a dinner containing 8.0x10 raised to power 6j of energy. He wishes to do an equivalent amount of work in a nearby
11 answers
asked by
Reigna
3,995 views
A stonemason lifts a small boulder weighing Fw = 80 N from the ground onto a height = 1.50 m wall in the time t = 2.0 s.
Using
4 answers
asked by
harley
1,817 views
How much work is done in lifting a 6kg object from the ground to a height of 4m?
A 12n object is lifted 5m how much work is done
3 answers
asked by
Derrick
1,291 views
The air 10 cm diameter cylinder, as shown below, is heated until the spring is compressed 50mm. Find the work done by the air on
3 answers
asked by
chris
842 views
Eight books, each 4.1 cm thick with mass 1.8 kg, lie flat on a table. How much work is required to stack them one on top of
4 answers
asked by
Linda
2,593 views
The efficiency to machine is 75% , if this machine raises a load of 150kg , through a vertical height of 20m,calculate the
4 answers
asked by
Olutunde
766 views
Find the work done in pumping the water over the rim of a tank that is 40 feet long and has a semicircular end of radius 10 feet
3 answers
asked by
Anonymous
984 views
An elevator carries 10 people of average mass 70kg each to a height of 5 meters in 2 minutes. What is the power generated by the
2 answers
asked by
Milky
110 views
a petrol engine raises 200 liters of water in a well from a depth of 7m in 6seconds show that the power of the engine is about
7 answers
asked by
abeje
624 views
I was wondering if my answers are correct. Thanks in advance.
1. A boy pushes down on a car rolling horizontally down the road.
7 answers
asked by
Liz
8,851 views
A force of 40N Will stretch it through 5.0cm and what work will be done in stretching the wire through 5.0M
3 answers
asked by
Moyinoluwa
633 views
A person raises a box with a weight of 50 newtons by 0.5 meter. How much work in joules does the person do in this action?
1 answer
asked by
scienze
43 views
What is the efficiency of a pulley if 5000 joules of energy results in 3000 joules of work? Please show your calculations.
1 answer
asked by
Ellie
20 views
A person pushes a box. He applies a force of 400 newtons, and he pushes the box for a distance of 4 meters. After he stops
7 answers
asked by
robertツ💎
46 views
A person pushes a box. He applies a force of 400 newtons, and he pushes the box for a distance of 4 meters. After he stops
11 answers
asked by
vampire
64 views
A person pushes a box. He applies a force of 400 Newtons and he pushes the box for a distance of 4 meters after he stops pushing
1 answer
asked anonymously
49 views
A person pushes a box. He applies a force of 400 newtons, and he pushes the box for a distance of 4 meters. After he stops
1 answer
asked by
uyth
40 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
3 answers
asked anonymously
32 views
Which statement best describes work?(1 point)
Responses Work is done whenever a force acts on an object. Work is done whenever a
1 answer
asked anonymously
23 views
A shot-putter puts a shot (weight =
71.1 N) that leaves his hand at a distance of 1.52 m above the ground. Find the work done by
1 answer
asked by
Banya
16 views
A gardener pushes a lawn roller through a distance of 20 m. If he applies a force of 20 N in a direction inclined at 60° to the
1 answer
asked by
Banya
15 views
● Explain the equation: Work = force x distance
1 answer
asked by
math man
6 views
calculate the work done when a person pushes a car from its stationary position to a distance of 50m applying a force of 200n
10 answers
asked by
augustine samson
2,370 views
A chain that is 30 m long and weighs 120N.m hangs from the drum of a winch.
Determine the work to wind the first 9m of the chain
4 answers
asked by
Yolanda
1,166 views
A block is acted on by a force that varies as (2.8*10^4 N/m)x for 0<=x<=.21m, and then remains constant at 5880 N for larger x.
1
4 answers
asked by
Megan
4,347 views
A tank is full of water. Find the work required to pump the water out of the spout. (Use 9.8 m/s^2 for g. Use 1000 kg/m^3 as the
4 answers
asked by
A
11,047 views
A spring gun is made by compressing a spring in a tube and then latching the spring at the compressed position. A 4.87-g pellet
3 answers
asked by
Casey
2,286 views
An electric motor is tested and found 76% efficient. if the input work is 400 J, what is the motors output work?
A ramp has a
1 answer
asked by
Kellie
663 views
A boy of mass 10kg climbs up a steps of height 2m in 20s calculate the power of the boy
2 answers
asked by
Victoria
106 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 by
no name
204 views
Joe is a former basketball player who is now a work-out junkie, and especially loves to do push-ups. He was a good athlete, but
3 answers
asked by
kristin
1,017 views
A 8.43-Newton force was applied for an unknown displacement; however, it is known that 376 joules of work was done. What is the
4 answers
asked by
Kells
315 views
A 5.0kg textbook is raised a distance of 30.0cm as a student prepares to leave for school. How much work did the student do on
9 answers
asked by
Misty T
3,448 views
A bullet of mass of 30g and travelling at a speed of 200msˉ¹ embeds itself in a wooden block. The bullet penetrates a distance
5 answers
asked by
James
3,531 views
Anne exerts a force of 34.1 n to pitch a softball she moves the ball 1.8 meters before releasing it. what amount of work did
4 answers
asked by
:)
543 views
Piano movers hoist a 200 kg piano 10 m high in 30 s using a rope and simple pulley. What is their power output?
(Points : 1) 70 W
5 answers
asked by
Phil
2,662 views
A 100 kg hoop rolls along a horizontal floor so that the hoop's center of mass has a speed of 0.230 m/s. How much work must be
2 answers
asked by
Joey
938 views
A swimming pool has the shape of a right circular cylinder with radius 13 feet and height 10 feet. Suppose that the pool is full
2 answers
asked by
bill
124 views
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