When a bus starts suddenly, the passengers are pushed back. This is an example of which of the following? Newton's first law 2 Newton's second law 3 Newton's third law 4. None of Newton's laws

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Newton's First Law of Motion

If a very smooth ball is rolled down an inclined surface with zero friction, the ball will continue to roll indefinitely for an infinite time, in an attempt to reach to the same height on the opposite hill!