| 1. | The kinematic approximation corresponds to the case which is dominated by contact forces.
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| 2. | Contact force is any force that requires contact to be enforced.
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| 3. | While the ball and the table are separated, there is no contact force.
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| 4. | Hence the infinite contact force is not at all an obstacle to the integration.
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| 5. | In practice, as noted, these are surface-contact forces between objects.
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| 6. | Does Contact force exist even when there is no gravity . "'Bold text "'
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| 7. | The most familiar example of a non-contact force is weight.
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| 8. | All that changes when the ground is removed is the contact force on your feet.
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| 9. | Forces involved are normally particle gravity and inter-particle contact forces including normal and tangential force.
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| 10. | Typically, it is a contact force and not uniform across the mass of the body.
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