Задача 10621.

The horizontal plane is the body weight of 1 kg. With some point it starts to operate in the direction of a constant force, the value of which varies with time according to the law F = at, where a = 0,98 N / s. The coefficient of friction of the body on the plane k = 0,2. Find a job force F in the first two seconds after the start of the movement.

Detailed solution shorthand terms, formulas, laws used in the decision, the withdrawal of the calculation formula and the response.
If you have any questions to address, please. I´ll try to help.