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How many joules of work are done when a 20 kg box is lifted 5 meters above the floor?
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∙ 14y ago
980
w=m x g x d
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∙ 14y ago
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What is the GPE of a 5 kg bowling ball sitting on a rack 2 m above the floor?
On earth: Potential energy = mgh so: 2kg * 9,81m/s^2 * 5m = 98,1 Joule
How many energy do you need to go upstairs?
Well obviously it depends on the mass being lifted, which is the elevator itself, the people in it, and their luggage if any. If the height of one floor is say 3 meters, the amount of energy used will be M x 9.81 x 3 Joules. M=mass in kg, 9.81 = the gravitational acceleration in meters/sec2. Let this energy be E Joules. 1 Joule = 1 watt.sec, so we have E watt.secs, then you can scale this to KWh (kilowatt.hours), and so get a figure for the amount of electricity used, then multiply this by the cost per KWh. Taking a figure to get the ball park area, I would guess the elevator and 4 people plus luggage at 2000 kg. Then E = 58,860 Joules = 58,860 watt.secs = 0.01635 kilowatt.hours. (3600 seconds in 1 hour). So it is a small amount of electricity and a small amount of money, the exact amount will depend on what your electricity costs per unit (one unit is usually 1 kilowatt.hour)
How many SQUARMTR in a linear meter?
A square meter is a unit for an area. If you have a room that is 3 meters by 4 meters, it has a floor area of 3x4=12 square meters. This unit can not be converted to regular meters because they measure two different sort of things.
How do I investigate a water stain on the ceiling?
Have you access to the floor above it? if you do, try to life some floorboards and see what you can find. If the ceiling is the bottom of the attic, find a way in and check out the pipes. If you can't access floor above, ask whoever lives there to have a look for you.
how should i sit in a chair?
The correct sitting position: Your arms should be resting parallel to the floor, your legs should be in the same position and your feet should be flat. Your back should be against the chair, and your shoulders should be back (but not lifted or hunched).
How many joules of work are done when a 20 newton box is lifted 5 meters off of the floor?
100
How many joules of work are done when a 20 newton is lifted 5 meters off of the floor?
The idea here is to multiply the force by the distance.
How many joules of work are done when a 20 newton box is lifted 5 meter off of the floor?
100
What is the potential energy when a 5 kg box is lifted 3 m from the floor?
The potential energy is 147 joules.
When a 20 newton box is lifted 5 meters off of the floor how much joules does it work?
The work done is stored as potential energy of the box P=Mgh F=Ma (a=g) F=Mg h=5m Therefore the work done is 20*5 = 100 joules -----------------------------------------------------------------------------------------------------
Calculate the work done in lifting a 500-N barbell 2.2m above the floor what is the potential energy of the barbell when it is lifted to this height?
Work = Force x distance So since the barbell is 500N and the barbell travels 2.2 meters it becomes 500N x 2.2m = 1100 joules (N x m)
About how many meters above the floor is the top of the chalkboard?
h
A box having a mass of 5.00 kg is lifted 75.0 cm from ground level to the top of a desk What is the gravitational potential energy of the box on the desktop. show your work?
m g h = (5.00) x (9.8) x (0.75) = 36.75 newton-meters = 36.75 joules, with respect to the floor.
What is the GPE of a 3 kg block 10 m above the floor?
GPE = m*g*h = 294 Joules.
Holding 25-N bag of sugar 1 meter above the floor requires how many joules of work?
24
Can an object have energy when it is at rest?
Sure. When a 6-kg bowling ball is resting on a shelf that's 2 meters off the floor, it has 12 joules of gravitational potential energy referenced to the floor.
How much work in joules is performed when a force of 800.0 N is exerted while pushing a crate across a level floor for a distance of 1.5 meters?
We must assume that the force pushes parallel to the floor.Work = (force) x (distance) = (800) x (1.5) = 1,200 newton-meters = 1,200 joules
