Which of the following statements is/are NOT correct?
I. Force per unit volume is called pressure.
II. Liquids can exert pressure on walls of containers. III. Force acting on an object can cause a change in it state of motion but not its shape.
Show answer & explanation
Correct answer: D
Explanation
The correct answer is Option 4 i.e. Only I and III.
I. Incorrect – Force per unit area, not volume, is called pressure.
II. Correct – Liquids do exert pressure on the walls of containers due to the random motion of their particles.
III. Incorrect – A force acting on an object can change both its state of motion and its shape, depending on how the force is applied.
Therefore, only statement II is correct. The other two misrepresent fundamental physical concepts and should be revised for accuracy.