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Motion in a Plane — Physics STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 SciencePhysicsMotion in a Plane1 Mark
MCQ
Consider the quantities, pressure, power, energy, impulse, gravitational potential, electrical charge, temperature, area. Out of these, the only vector quantities are
  • A
    Impulse, pressure and area.
  • ✓
    Impulse and area.
  • C
    Area and gravitational potential.
  • D
    Impulse and pressure.
✓

Answer

Correct option: B.
Impulse and area.
We know that impulse $J = F. \Delta\text{t}=\Delta\text{p},$
where $F$ is force, At is time duration and $Ap$ is change in momentum.
As $\Delta\text{p}$ is a vector quantity,
hence impulse is also a vector quantity.
Sometimes area can also be treated as vector direction of area vector is perpendicular to its plane.

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