Solution of task 13.3.10 from the collection of Kepe OE

Solution of task 13.3.10 from the collection of Kepe OE

13.3.10
The material point moves but the curvilinear trajectory under the action of the force F = 15? + 0.3tn.
Determine the mass of the point if, at time t = 20 s, its acceleration is a = 0.6 m / s2.
(Answer 26.9)

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