Question

В стакане, доверху наполненном водой и закрытом сверху, плавает деревянный шарик. Как изменится сила давления шарика на крышку, если стакан движется с ускорением a, направленным вверх.

Answer 1

Для первого случая N+m*g-Fа=0   N1=Fa-mg


для второго случая Fa-mg-N2=ma

N2=Fa-mg-ma   (  сравнивая формулы видим что сила на крышку уменьшится)

Answer 2

Understanding the Scenario

In a glass filled to the top with water and closed at the top, there is a wooden ball floating. The glass is moving upwards with an acceleration 'a'. We need to determine how the force of pressure of the ball on the lid will change due to this upward acceleration.

Analysis and Explanation

When the glass is moving upwards with an acceleration 'a', the apparent weight of the ball will increase. This is due to the fact that the ball is experiencing two forces: its weight and the upward force due to the acceleration of the glass. As a result, the pressure exerted by the ball on the lid will also increase.

Conclusion

Therefore, the force of pressure of the ball on the lid will increase when the glass is moving upwards with an acceleration 'a'.