A van accelerates down a hill

Описание к видео A van accelerates down a hill

A van accelerates down a hill, going from rest to 30.0 m/s in 6.00 s. During
the acceleration, a toy (m = 0.100 kg) hangs by a string from the van’s ceiling. The acceleration is such that the string remains perpendicular to the ceiling. Determine (a) the angle, theta, and (b) the tension in the string.

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