A closed tank containing water is moving in a horizontal direction along a straight line at a constant speed. The tank also contains a steel ball and a bubble of air. If the tank is decelerated horizontally, then i) the ball will move to the front ii) the bubble will move to the front iii) the ball will move to the rear iv) the bubble will move to the rear Find out which of the above statements are correct ? A. (i) and (ii) B. (i) and (iv) C. (ii) and (iii) D. (iii) and (iv)

[amp_mcq option1=”(i) and (ii)” option2=”(i) and (iv)” option3=”(ii) and (iii)” option4=”(iii) and (iv)” correct=”option1″]

The correct answer is A. (i) and (ii).

When the tank is decelerated, the ball and the bubble will both experience a force in the opposite direction of the motion of the tank. This force is called inertia. The ball has a greater mass than the bubble, so it will experience a greater force of inertia. This means that the ball will move to the front of the tank, while the bubble will move to the rear of the tank.

Here is a more detailed explanation of each option:

• Option (i): The ball will move to the front. This is because the ball has a greater mass than the bubble, so it will experience a greater force of inertia. This force will cause the ball to move in the opposite direction of the motion of the tank, which is to the front.
• Option (ii): The bubble will move to the rear. This is because the bubble has a smaller mass than the ball, so it will experience a smaller force of inertia. This force will cause the bubble to move in the opposite direction of the motion of the tank, which is to the rear.
• Option (iii): The ball will move to the rear. This is incorrect because the ball has a greater mass than the bubble, so it will experience a greater force of inertia. This force will cause the ball to move in the opposite direction of the motion of the tank, which is to the front.
• Option (iv): The bubble will move to the front. This is incorrect because the bubble has a smaller mass than the ball, so it will experience a smaller force of inertia. This force will cause the bubble to move in the opposite direction of the motion of the tank, which is to the rear.