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1. A box at rest on a level table. Weight Normal BalancedUNbalanced
2. A box being dragged to the right at a constant speed on a level surface. Weight Normal BalancedUNbalanced Pull Drag
3. A crate accelerated to the right on a level surface. Weight Normal BalancedUNbalanced Pull Drag
4. A box moving to the right on a level surface and sliding to a stop. Weight Normal BalancedUNbalanced Pull Drag
4. A box moving to the right on a level surface and sliding to a stop. Weight Normal BalancedUNbalanced Drag OR
5. A box at rest on an incline. UNbalancedBalanced Weight Normal Friction Wt acting down incline (Wt ) Wt acting against incline (Wt )
6. A box sliding down an incline at 2 m/s. UNbalancedBalanced Weight Normal Friction (Wt )
UNbalancedBalanced 7. A rock free falling off the side of a cliff. Weight Air Drag
UNbalancedBalanced 8. A hovering helicopter. Weight Lift
UNbalancedBalanced 9. A helicopter accelerating upward. Weight Lift
UNbalancedBalanced 10. A helicopter accelerating downward. Weight Lift
UNbalancedBalanced 11. An airplane in level flight moving forward at 400 km/hr. Weight Lift Drag Thrust
UNbalancedBalanced 12. An airplane in level flight and speeding up. Weight Lift Thrust Drag
UNbalancedBalanced 13. An airplane climbing at a constant speed. Weight Thrust Air Drag
UNbalancedBalanced 14. A large box being pushed against a vertical wall. Box PUSHED up against wall Wall PUSHING back on box Weight Normal FLOOR WALL
UNbalancedBalanced 15. A person standing in an elevator that is not moving. WeightFloor pushing up
UNbalancedBalanced 16. A person moving upward in an elevator at a constant speed. WeightFloor pushing up
UNbalancedBalanced 17. A person accelerating upward in an elevator. Weight Floor pushing up
UNbalancedBalanced 18. A person moving downward in an elevator at a constant speed. WeightFloor pushing up
UNbalancedBalanced 19. A person moving upward in an elevator that is slowing down to a stop. Floor pushing up Weight
UNbalancedBalanced 20. A satellite that is orbiting the earth at a constant speed. Weight
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