Problemas

to which of these processes is the angular momentum of the object conserved? An ice-skater (the object)spinning with his arms outstretched. pulls in his arms.causing him to spin faster around his central axis. Acar's wheel (the object) begins rotating around the axle as the car pulls away from a stop sign. A football (the object)begins spinning around its central axis as it is thrown by a player. A skydiver (the object)tucked into a ball and tumbling through the air, puts out her hands and stops her rotation relative to the ground. IDONT KNOWYET
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Omarmaestro · Tutor durante 5 años

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The angular momentum of the object is conserved in the case of the car's wheel (B) and the football (C).
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## Step 1<br />The principle of conservation of angular momentum states that the total angular momentum of a system remains constant if no external torques are applied. This means that the angular momentum of an object will remain the same unless an external force is applied.<br /><br />## Step 2<br />In the case of the ice-skater, when he pulls in his arms, he is applying an external torque to his body. This changes his moment of inertia and causes him to spin faster. Therefore, his angular momentum is not conserved.<br /><br />## Step 3<br />For the car's wheel, when it begins rotating, there is no external torque applied. The car's wheel starts from rest and gains angular momentum as it begins to rotate. Therefore, its angular momentum is conserved.<br /><br />## Step 4<br />When the football is thrown, it starts from rest and gains angular momentum as it begins to spin. Therefore, its angular momentum is conserved.<br /><br />## Step 5<br />For the skydiver, when she tucks into a ball and stops her rotation, she is applying an external torque to her body. This changes her moment of inertia and stops her rotation. Therefore, her angular momentum is not conserved.
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