Qer
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can someone explain me the difference between thrust and tension please?
(with example if possible)
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old_engineer
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(Original post by Qer)
can someone explain me the difference between thrust and tension please?
(with example if possible)
This sometimes comes up in situations where are car is towing a trailer and the two are connected by a light inextensible rod. If the car is accelerating and/or going uphill and/or there is a frictional force resisting the trailer's motion, the forces at the ends of the rod will be as follows:

* At the connection between the car and the rod, the car is exerting a force F on the rod in the direction of motion. The rod is exerting an equal force F on the car in the opposite direction. (Newton's third law of motion).

* At the connection between the rod and the trailer, the rod is exerting force F on the trailer in the direction of motion and the trailer is exerting an equal force F on the rod in the opposite direction.

* The forces acting on the rod are acting as though to stretch it, so the rod is said to be in tension. Tension = F.

If the car is decelerating and/or going downhill, the directions of all the forces mentioned above are reversed. The trailer is now pushing the car rather than being pulled by it. The equal forces F acting on the rod are acting as though to compress it. The wording sometimes used in this situation is that there is thrust in the rod rather than tension. Thrust = F.
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Qer
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#3
Report Thread starter 2 years ago
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(Original post by old_engineer)
This sometimes comes up in situations where are car is towing a trailer and the two are connected by a light inextensible rod. If the car is accelerating and/or going uphill and/or there is a frictional force resisting the trailer's motion, the forces at the ends of the rod will be as follows:

* At the connection between the car and the rod, the car is exerting a force F on the rod in the direction of motion. The rod is exerting an equal force F on the car in the opposite direction. (Newton's third law of motion).

* At the connection between the rod and the trailer, the rod is exerting force F on the trailer in the direction of motion and the trailer is exerting an equal force F on the rod in the opposite direction.

* The forces acting on the rod are acting as though to stretch it, so the rod is said to be in tension. Tension = F.

If the car is decelerating and/or going downhill, the directions of all the forces mentioned above are reversed. The trailer is now pushing the car rather than being pulled by it. The equal forces F acting on the rod are acting as though to compress it. The wording sometimes used in this situation is that there is thrust in the rod rather than tension. Thrust = F.
What will be the direction of tension Force (opposite to the direction of acceleration )?
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old_engineer
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#4
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(Original post by Qer)
What will be the direction of tension Force (opposite to the direction of acceleration )?
There is not a single direction for tension. The directions of the forces acting on the rod are as indicated in my earlier post.
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