Statement I: When spinning ball is thrown it deviates from its usual path in flight.
Statement II: Time of flight will remain same if axis of rotation is vertical.

Options

A. A.Statement I is true, statement II is true and Statement II is a correct explanation for Statement I.
B. B.Statement I is true, Statement II is true and Statement II is NOT the correct explanation for Statement I.
C. C.Statement I is true, Statement II is false.
D. D.Statement I is false, Statement II is true.

Explanation

To solve the question, we need to analyze both statements provided:

**Statement I:** When a spinning ball is thrown, it deviates from its usual path in flight.
**Statement II:** Time of flight will remain the same if the axis of rotation is vertical.

### Step 1: Analyze Statement I
When a spinning ball is thrown, it experiences a phenomenon known as the Magnus effect. This effect occurs due to the difference in pressure on either side of the ball caused by its spin. The side of the ball that is spinning in the direction of the throw experiences higher pressure, while the opposite side experiences lower pressure. This pressure difference causes the ball to deviate from its straight path.

**Conclusion for Statement I:** True. The spinning ball deviates from its usual path due to the pressure difference created by its spin.

### Step 2: Analyze Statement II
In the case of a spinning ball, if the axis of rotation is vertical, the forces acting on the ball in the vertical direction remain unchanged. The vertical motion of the ball is solely influenced by gravity, which acts downwards. Since the spinning does not introduce any additional vertical forces, the time of flight (the duration the ball remains in the air) will not be affected by the spin of the ball.

**Conclusion for Statement II:** True. The time of flight remains the same if the axis of rotation is vertical because the vertical forces acting on the ball (gravity) do not change.

### Final Conclusion
Both statements are true, and Statement II correctly explains Statement I. Therefore, the answer to the question is that both statements are true, and Statement II is the correct explanation of Statement I.

### Answer:
Both Statement I and Statement II are true, and Statement II is the correct explanation of Statement I.

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