Two students perform an experiment with soccer balls. They kick bro soccer balls so that they collide. They measure the total momentum of the two soccer balls before and after
the collision Which statement explains why the total momentum of the soccer balls before and after the collision may not be the same? (1 point)
O The soccer balls each have a different momentum after the collision than before the collision
O The soccer bails exert forces on each other when they collide
O The system does not have any extemal forces
O The system has external forces, such as thiction and air resistance, acting on it

Question

21-09-2022
Physics

contestada

Two students perform an experiment with soccer balls. They kick bro soccer balls so that they collide. They measure the total momentum of the two soccer balls before and after
the collision Which statement explains why the total momentum of the soccer balls before and after the collision may not be the same? (1 point)
O The soccer balls each have a different momentum after the collision than before the collision
O The soccer bails exert forces on each other when they collide
O The system does not have any extemal forces
O The system has external forces, such as thiction and air resistance, acting on it

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aryanagarwal466 aryanagarwal466 · Answer 1 · 2022-09-23T08:01:28+02:00

D) The system has external forces, such as friction and air resistance, acting on it.

According to Newton's first law, a change in motion is brought about by a net external force. External forces are forces that originate outside of an object or system and operate on it. Internal forces are generated within the studied system and do not result in acceleration. As a result, while analyzing an object's motion, we only take into account the exterior forces that cause it to accelerate, ignoring the interior forces.

The applied force, normal force, tension force, friction force, and air resistance force are examples of external forces. The internal forces, however, also include gravitational, magnetic, electric, and spring forces. A greater acceleration results from a greater net external force. The system's acceleration would thus be inversely proportional to the system's net external force.

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