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4vir4ik [10]
4 years ago
10

What do work and energy have in common

Physics
1 answer:
spayn [35]4 years ago
3 0

Energy and Work have the same unit of measurement which is Joules in SI units.

Explanation:

  • A Joule of Work is said to be done on an object when energy is transferred to that particular object.
  • If two objects are involved, when one object transfers energy onto the second, a joule of work is said to be done by the first object.  
  • Work is also the application of force on an object over a distance. So Work = Force × Displacement
  • Energy is neither created nor destroyed. It is in 2 forms - kinetic and potential.
  • Kinetic energy is defined as the energy of a moving object while potential energy is known as the energy that is stored within an object.
  • Kinetic Energy = 1/2 × mass × (velocity)²
  • Potential Energy = mass × acceleration due to gravity × height
  • Both energy and work are measured in Joules.
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A 0.5 kg stone is raised from 1m to 2m height from the ground. what is the change in potential energy of the stone?
Usimov [2.4K]

Given: The mass of stone (m) = 0.5 kg

Raised from heights (h₁) = 1.0 m to (h₂) = 2.0 m

Acceleration due to gravity (g) = 9.8 m/s²

To find: The change in potential energy of the stone

Formula: The potential energy (P) = mgh

where, all alphabets are in their usual meanings.

Now, we shall calculate the change in potential energy of the stone

Δ P = P₂ - P₁ = mg (h₂ - h₁)

or,                = 0.5 kg ×9.8 m/s² ×(2.0 m - 1.0 m)

or,                = 4.9 J

Hence, the required change in the potential energy of the stone will be 4.9 J

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4 years ago
The force of gravity acting upon an object is the objects mass. True or false
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False , because mass is the amount of matter contains
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In a certain city, electricity costs $0.13 per kW·h.
Alex_Xolod [135]
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The north and south forces have no effect on the east and west forces.
We can handle the two groups separately.

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                   =  (20N south)  +  (20N north + 10N north)

                   =                              10N north .


                       (40N east)  +  (50N west)

                   =  (40N east)  +  (40N west + 10N west)

                   =                              10N west .
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