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A ball thrown by a boy from a roof-top h...

A ball thrown by a boy from a roof-top has oscillatory motion.

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**Step-by-Step Solution:** 1. **Understanding the Motion Types**: - First, we need to understand the different types of motion. Oscillatory motion refers to motion that repeats itself in a regular cycle, such as a pendulum swinging back and forth. Rectilinear motion, on the other hand, is motion along a straight line. 2. **Analyzing the Scenario**: - In this scenario, a ball is thrown from a rooftop. When the ball is thrown, it follows a path due to the force of gravity acting on it. This path is a straight line downwards (or at an angle if thrown at an angle). 3. **Identifying the Type of Motion**: - Since the ball moves in a straight line (downwards) and does not return to its original position in a cyclical manner, it does not exhibit oscillatory motion. Instead, it demonstrates rectilinear motion. 4. **Conclusion**: - Therefore, the statement that "a ball thrown by a boy from a rooftop has oscillatory motion" is false. The correct classification of the ball's motion is rectilinear motion. **Final Answer**: The statement is false. ---
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Knowledge Check

  • Assertion: The motion of the earth around the sun is perriodic but not oscillatory. Reason: Oscillatory motion is necessarily periodic but periodic motion is not necessarily oscillatory.

    A
    If both assertion and reson are true and reason is the correct explanation of assertion
    B
    If both assertion and reason are true but reason is not the correct explanation of assertion.
    C
    If assertion is true but reason is false.
    D
    If both assertion and reason are false.

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