Question

Какая сила действует на гимнастку во время прыжка!!

Answer 1

Если пренебречь силой трения о воздух, то - только сила тяжести. Кстати, и во всё остальное время тоже.

Answer 2

The Force Acting on a Gymnast During a Jump

During a jump, several forces act on a gymnast. Let's explore these forces in detail:

1. Gravity: Gravity is the force that pulls objects towards the center of the Earth. It acts vertically downwards and is the primary force that affects a gymnast during a jump. Gravity gives the gymnast weight and determines the acceleration due to gravity, which is approximately 9.8 m/s^2 on Earth.

2. Normal Force: The normal force is the force exerted by a surface to support the weight of an object resting on it. In the case of a gymnast jumping, the normal force is exerted by the floor or apparatus the gymnast is jumping from. It acts perpendicular to the surface and counteracts the force of gravity. The normal force allows the gymnast to push off the ground or apparatus and initiate the jump.

3. Air Resistance: Air resistance, also known as drag, is the force exerted by air molecules on a moving object. During a jump, air resistance opposes the motion of the gymnast. However, the effect of air resistance on a gymnast's jump is typically minimal compared to the other forces involved, especially for short jumps.

4. Internal Forces: Internal forces are forces that act within the gymnast's body. These forces include muscle contractions and joint movements that generate the necessary energy and momentum for the jump. The gymnast's muscles and joints work together to produce the force required to propel the body upwards.

It's important to note that the specific forces acting on a gymnast during a jump can vary depending on the type of jump, the apparatus used, and the technique employed. The forces mentioned above are general forces that are typically present during a jump.

Conclusion

In conclusion, the main forces acting on a gymnast during a jump are gravity, the normal force, air resistance (to a lesser extent), and internal forces generated by the gymnast's muscles and joints. These forces work together to enable the gymnast to perform various jumps and maneuvers.