The object with mass m of 10kg, on the horizontal ground, under the action of horizontal pulling force F 1 of 20n, moves along the horizontal ground with uniform speed and straight line An object with a mass of 10kg, m, is placed on the horizontal ground. Under the action of the horizontal pulling force F1 of 20n, the object moves in a straight line at a constant speed along the horizontal ground. If the object still moves in a straight line at a constant speed by using the pulling force F2 which is inclined upward at an angle of 37 degrees to the horizontal direction, the size of F2 is______ The dynamic friction coefficient between the object and the horizontal ground is_____ .（cos37°=0.8） | Math enthusiast | Mathematical art

The object with mass m of 10kg, on the horizontal ground, under the action of horizontal pulling force F 1 of 20n, moves along the horizontal ground with uniform speed and straight line An object with a mass of 10kg, m, is placed on the horizontal ground. Under the action of the horizontal pulling force F1 of 20n, the object moves in a straight line at a constant speed along the horizontal ground. If the object still moves in a straight line at a constant speed by using the pulling force F2 which is inclined upward at an angle of 37 degrees to the horizontal direction, the size of F2 is__ The dynamic friction coefficient between the object and the horizontal ground is_ .（cos37°=0.8）

Because of the uniform linear motion of horizontal pulling force at 20n, the resistance f = 20n
UMG = 20 friction factor u = 0.2
When the direction changes, the real horizontal tension f = F2 * cos37 ° = 0.8f2 = 20n
F2=25N

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