5. What do you mean by internal and external force? Explain why is it not possible to impart motion to a bus when all the passengers sitting inside push the bus simultaneously along the forward direction?
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Answer:
External forces are forces caused by external agent outside of the system
Internal forces are forces exchanged by the objects in the system
When a moving bus stops suddenly, the passenger are pushed forward because of the inertia of the passengers. ... Because the lower part of the body comes to rest with the bus while the upper part tends to continue its motion due to inertia
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Explanation:
External forces are forces caused by external agent outside of the system. Internal forces are forces exchanged by the objects in the system.
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