We suggest that you are in a moving bus. When its speed changes, you lean forward in the direction of the bus.

We suggest that you are in a moving bus. When its speed changes, you lean forward in the direction of the bus. Is the frame of reference associated with the bus inertial in this case?

Yes, because we keep our speed relative to the bus. An inertial frame of reference is considered to be relative to which the body retains its speed unchanged.



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