Questions LLC
Login
or
Sign Up
Ask a New Question
Work and Energy
Page 2
Questions (3,237)
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
4,049 views
Consider these changes. (a) Hg(l)->Hg(g) (b) 3O2(g)->2O3(g) (c) CuSo4*5H2O(s)->CuSO4(s)+5H2O(g) (d) H2(g)+F2(g)->2HF(g) At
4 answers
asked by
Anonymous
6,044 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
6,666 views
Calculate the work done by a stone mason lifting a stone of mass 15kg through a height of 2m.Take g=10N/Kg
5 answers
asked by
Peter
1,675 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
3,258 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
1,281 views
A skier of mass 110 kg travels down a frictionless ski trial. a.) If the top of the trail is a height 200m above the bottom,
4 answers
asked by
Jessica
2,129 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
151 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#
947 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
115 views
Note: Enter your answer and show all the steps that you use to solve this problem in the space provided. A lawn mower is pushed
1 answer
asked anonymously
16 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
1 answer
asked by
No
17 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
1,172 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
4,051 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
3,727 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
6,783 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
2,186 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
2,672 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
2,598 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
3,505 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
2,835 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
1,760 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
13,478 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
138 views
How is a joule defined?(1 point)
It is the work done when a force of 1 newton is applied to an object for a distance of 1 meter.
12 answers
asked by
Evieeee
2,362 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
2,461 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
9,703 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
3,651 views
A stone of mass 10kg fall from the height of 2m.calculate the workdone
5 answers
asked by
dayo
1,427 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
1,685 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
1,322 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
19,133 views
Two forces, of magnitudes F1= 80.0N and F2= 50.0N, act in opposite directions on a block, which sits atop a frictionless
5 answers
asked by
physics please show steps
13,111 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
9,494 views
an elevator lifts a total mass of 1.1x10^3 kg, a distance of 40 m in 12.5 s. How much power does the elevator demonstrate?
P=w/t
7 answers
asked by
Anonymous
6,393 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
6,204 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
7,821 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
3,407 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
1,401 views
A drum of mass 100kg is rolled into the deck of a lorry 1.5m above a horizontal floor using a plank 4m long. Calculate the work
7 answers
asked by
Anonymous
1,450 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
7,130 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
7,630 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
5,486 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
1,725 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
2,339 views
find the work done in winding up a 175 ft cable that weighs 4.00 lb/ft?
5 answers
asked by
seth
4,476 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
3,119 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
4,045 views
12 kg wagon is being pulled at an angle of 38o above horizontal. What force is applied to the wagon if it accelerates from rest
5 answers
asked by
silverback - sorry Repost for Damon
2,511 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
4,899 views
Pages
1
2
3
4
5
6
7
8
9
10
Parent Categories (58)
Atomic Structure
Chemical Reactions
Circular motion
Classical mechanics
Dynamics
Electric charge
Electric Charges and Fields
Electric Circuits
Electric Fields
Electric Fields and Potential
Electric Fields and Potentials
Electric Forces
Electric Potential
Electrical Circuits
Electricity
Electricity and Magnetism
Electromagnetism
Electrostatics
Energy
Fluid Mechanics
Force
Force and Motion
Forces
Forces and Motion
Forces and Springs
Gravitation
Hiking and Backpacking
Kinematics
Kinetics
Laws of physics
Mechanical Energy/Energy
Mechanical Engineering
Mechanical Forces
Mechanics
Mechanics and Machines
Mechanics and Motion
Mechanics or Dynamics
Mechanics or Energy
Mechanics, Sub-sub-category: Work and Energy
Mechanics/Dynamics
Mechanics/Energy
Motion and Forces
Newton's Laws of Motion
Newtonian Mechanics
Physical Science
Physics
Physics and Engineering
Physics-related problems
Physics-related Questions
Physics/Math
Power
Rotational motion
Science and Physics
Science or Physics (as the text is related to scientific principles)
Springs
Springs and Elasticity
Thermodynamics
Units of Measurement