một chiếc thước AB có chiều dài 60cm có thể quay trong mặt phẳng thẳng đứng quanh trục cố định nằm ngang đi qua đầu A. Tác dụng vào đầu B một lực có phương nằm trong mặt phẳng thẳng đứng, có độ lớn F = 4N, hướng của lực hợp với AB một góc 37. Mô men lực có độ lớn bằng
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Very large accelerations can injure the body, especially if they last for a considerable length of time. one model used to gauge the likelihood of injury is the severity index ( ), defined as =/ . in the expression, is the duration of the accleration, but is not equal to the acceleration. rather, is a dimensionless constant that = the number of multiples of that the acceleration is equal to.in one set of studies of rear-end collisions, a person's velocity increases by 13.7 km/h with an acceleration of 36.0 m/s2 . let the + direction point in the direction the car is traveling. what is the severity index for the collision?
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What are similarities and differences between refraction, reflection, diffraction and absorption?
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What object a collides with object b and bounces back its final momentum is?
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một chiếc thước AB có chiều dài 60cm có thể quay trong mặt phẳng thẳng đứng quanh trục cố định nằm n...
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