A water tanker filled up to $\frac{2}{3}$ of its height is moving at a uniform speed. On sudden application of brakes, the water in the tank would

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Move backward

be unaffected

move forward

rise upwards

answer is C.

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Detailed Solution

A water tanker filled up to

2 / 3

of its height is moving with a uniform speed. On the sudden application of brakes, the water in the tank would move forward.
"Newton's first law of motion, also known as the law of inertia, states that any object will continue to move in the same direction at the same speed as long as no external force is applied to it".
The water will continue to move forward even after the brakes are applied. Finally, the tanker will come to a halt, but the water will continue to flow and may overflow if the tanker does not have a closed roof.

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