The car tyres push on the road the way our feet do when we are walking. By Newton's third law the road pushes the car in the direction of motion.abdossamad2003 said:
When a person walks, it is clear that an external force enters the sole of the foot from the ground and agrees to move in that direction, but in the case of a car, where is the direction of the reaction force and where does it enter?PeroK said:
The bottom of the tyre acts like a foot.abdossamad2003 said:
That is the force from the tire acting on the road.abdossamad2003 said:
When the car accelerates forwards, the Earth must turn imperceptibly backwards.jack action said:
This would also be just as true in the case of a rocket powered car but in that case the friction between the road and tire is not the driving force but only prevents slipping. The Earth still moves, just not as much. Momentum of the car is conserved with the Earth and the rocket exhaust.abdossamad2003 said:
It's the reaction force on the wheel from the ground.abdossamad2003 said:
No. There's no friction acting against the motion.abdossamad2003 said:
##F_t## is the force of the tyre on the road.abdossamad2003 said:
Yes, ##F_R## acts against the rotation of the wheel driven by the engine.abdossamad2003 said:
I think the reaction force shown is the friction. Friction acts between the tire and the road so there is an equal and opposite force on each. Here is a short video explanation.abdossamad2003 said:
If the car is coasting, yes. But not for the drive wheels when the car is speeding up. The tires form a contact patch with the pavement. When the car is speeding up the force of friction on the contact patch of the drive wheels is in the direction of motion.abdossamad2003 said:
Newton's second law states that the force applied to a car is directly proportional to its mass and acceleration. This means that the heavier the car and the faster it accelerates, the more force is needed to move it.
In the context of cars, Newton's second law is used to calculate the necessary force to move a car at a certain acceleration. This can be used to determine the power and torque needed for a car's engine, as well as the braking force needed to slow down or stop the car.
According to Newton's second law, the acceleration of a car is directly proportional to the force applied to it. This means that the greater the force applied, the greater the acceleration of the car will be.
According to Newton's second law, the force needed to move a car is directly proportional to its mass. This means that the heavier the car, the more force is needed to accelerate it at a certain rate.
When a car is braking, the force applied to it is in the opposite direction of its motion. According to Newton's second law, this force is directly proportional to the car's mass and the rate at which it decelerates. This means that a heavier car will require more force to brake at a certain rate than a lighter car.