Work done Flashcards

1
Q

When is work done?

A
  • Work is done when an object is moved over a distance by a force that is applied in the direction of its displacement
  • If force is applied but the object doesn’t move then no work was done
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2
Q

Equation for work done

A
  • Work done (Nm) = force (N) X distance (m)
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3
Q

How is energy transferred and work done related?

A
  • When any work is done, energy is transferred from one store to another
  • Energy transferred (J) = work done (Nm)
  • 1J = 1Nm
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4
Q

How does friction effect work done?

A
  • Friction works in opposition to the motion of the object
  • When friction is present, energy is lost to the surrounding via heat
  • Air resistance is a type of friction
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