Conservative Forces and Energy Conservation – Rankers Physics

Potential Energy & Equilibrium: Practice Problem & Solution

State the incorrect statement among the following
When conservative force acts on a system and performs positive work on body, potential energy of body decreases
In an inelastic collision of two bodies linear momentum of system remains conserved
In case of inelastic collision, final kinetic energy is less than initial kinetic energy of the system
Total kinetic energy of system is conserved no matter what internal and external forces on body are present

Solution Explained:

To solve this problem, we apply the core principles of Potential Energy & Equilibrium. Understanding the underlying formula is key to arriving at the correct answer below:

In the presence of non-conservative internal forces (like friction or impact forces in inelastic collisions), total kinetic energy is not conserved, making statement (4) incorrect.

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Similar Practice Questions

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1. A cubical vessel of height 1 m is full of water. The minimum work done in taking water-out from vessel will be
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