If you slip on the muddy road and can't walk, tell me what you will do. Please write down two solutions and explain why you did it.

Method 1: When the car moves forward, the friction between the driving wheel and the ground is the driving force of the car. Because the road is muddy, the friction between the driving wheel and the ground is reduced, that is, the power is reduced. Therefore, the car can't run, and it is necessary to increase the power to let the car move forward. Measure 1: increase the friction between the wheel and the ground to increase the power, and rough bricks can be placed under the wheel; Measure 2: You can use external force to increase power, and several people can push the car out.

Method 2: The car is stuck in the mud, indicating that the pressure of the car on the ground is too great, and it is necessary to reduce the pressure of the car on the ground. Because the pressure of the car on the ground is constant, the stress area can only be increased to reduce the pressure, so the measures of putting boards under the wheels are taken.

So the answer is: method one: several people push the car out hard; Force can change the motion state of an object.

Method 2: put a board under the car; Increase the stress area and reduce the pressure.