Because of its simple structure, the scooter gets the thrill of being driven by the wind in the course of rapid taxi. It is more and more popular with teenagers. As shown in the picture, a child is "driving" a scooter to slide forward
(1) put one foot on the slide board, and the other foot back to the ground, a back force to the ground, the force between the objects is mutual, the ground gives a forward force, push people forward(2) tighten the adjusting knob, increase the friction by increasing the pressure; the pattern on the handle is to increase the roughness of the contact surface to increase the friction force;
(4) the pressure on the skateboard is F=G=m person g=25kg * 10N/kg=250N;The pressure on the skateboard: p=FS=250N100 x 10 - 4m2=2.5 * 104Pa;The pressure of the scooter on the ground is F '=G' = (m person +m car) g= (25kg+3kg) * 10N/kg=280N,(5) in order to improve the stability, the measures can be taken as follows: squat slightly and lower the center of gravityThe answer is: (1) the ground gives a forward force; (2) pressure; the roughness of the contact surface; (3) inertia; reduce; (4) 280; 2.5 x 104; (5) slightly squat body, reduce the center of gravity
(3) people and skateboards are movement, and when the player pedal the ground, feet off the ground, people and skateboards due to inertia, to maintain the original state of movement, continue to move forward;In the course of moving forward, the speed of the motion is decreased because of the friction resistance and the direction of its movement;
