Вопрос
1. Plasticine balls with masses of 200 g and 150 g move along a straight line towards each other at speeds v=0.5m/s and v_(.,)=1m/s There is an absolutely inelastic collision between the balls. a) What are the projections of the velocities of the balls on the x-axis directed along the velocity of the first ball? b).How is the velocity of the body formed as a result of collision directed? b) What is the projection of the velocity of the formed body on the x axis?
Решения
4.2
(351 Голоса)
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Экспертная проверка
ветеран · Репетитор 12 лет
Ответ
a) The projections of the velocities of the balls on the x-axis directed along the velocity of the first ball can be calculated using the formula:
where
is the projection of the velocity of the first ball on the x-axis,
is the velocity of the first ball, and
is the angle between the velocity and the x-axis.Since the balls are moving along a straight line towards each other, the angle
is 0 degrees. Therefore, the projection of the velocity of the first ball on the x-axis is:
Similarly, the projection of the velocity of the second ball on the x-axis is:
b) The velocity of the body formed as a result of the collision is directed along the velocity of the first ball. This is because the collision is absolutely inelastic, meaning the two balls stick together and move as a single body after the collision.c) The projection of the velocity of the formed body on the x-axis is the same as the projection of the velocity of the first ball on the x-axis, which is: