Displacement — Science definition

Defined in 3 courses:

Where it is taught

In use

In science, work is energy transferred by a force acting through a displacement.

Work: Transferring Energy with a Force

Displacement is the straight-line change in position from start to finish, written Δx = x_final − x_initial, and it does carry direction.

Describing Motion

Questions using displacement

Problem 1

An illustrative unknown has mass 54 g and displacement 20 cm³. References A/C are both 2.7 g/cm³ and B is 7.9. Argue which candidates remain and plan one additional property comparison.
Hints

Use the illustrated study titled Density as identification evidence. Keep the observations, model and conditions separate.

Answer and explanation

Density is 54/20=2.7 g/cm³. A and C remain consistent while B is inconsistent under matched conditions and adequate measurement precision. Density alone cannot distinguish A from C; choose a safe characteristic-property comparison with supplied reference data, such as solubility for approved samples. Name uncertainty and whether the object is homogeneous.

Density is 54/20=2.7 g/cm³. A and C remain consistent while B is inconsistent under matched conditions and adequate measurement precision. Density alone cannot distinguish A from C; choose a safe characteristic-property comparison with supplied reference data, such as solubility for approved samples. Name uncertainty and whether the object is homogeneous.

Response criteria

  • Calculate with correct units.
  • Distinguish support from unique identification.
  • Choose relevant further evidence and controls.

Problem 2

A box moves horizontally while its weight acts vertically. What work does weight do over that horizontal displacement?
Hints

State what the supplied observations or conditions establish, and separate that from any assumption.

Answer and explanation

Zero in this ideal case, because force and displacement are perpendicular.

Problem 3

Would the same horizontal displacement give work by a vertical force?
Answer and explanation

Not in this simple perpendicular-force case. Only the component along displacement contributes to that mechanical work.

Not in this simple perpendicular-force case. Only the component along displacement contributes to that mechanical work.

Response criteria

  • Use the supplied conditions and relevant evidence.
  • Explain the scientific mechanism or calculation.
  • State a meaningful limitation or testable next step.

Problem 4

A force does 30 J of work along a 5 m displacement. Find the force.
Answer and explanation

6 N

30 ÷ 5 = 6.

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