Physics Work & Energy SZABMU 2023
PMDC Verified Question 25 of 108
If a body of mass 'm' is accelerated on a smooth horizontal surface 'S' by a force 'F'. the work done FxS is converted into:
A
Heat energy
B
Kinetic energy
C
Potential energy
D
Electromagnetic energy
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: Kinetic energy
Concept:

Work applied to a mass on a frictionless (smooth) horizontal surface causes it to accelerate without gaining height.

Formula:

$$ W = F \times S = \Delta K.E $$

Solution:

  • Because the surface is horizontal, height doesn't change, so Potential Energy is zero.


  • Because the surface is "smooth" (frictionless), no energy is lost as Heat.


  • Therefore, 100% of the work done manifests as an increase in the object's velocity, which is Kinetic Energy.


Why other options are incorrect:

Heat energy requires friction. Potential energy requires a change in height or spring compression.

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