siddharth5129 said:As I understand it, friction is the force that accelerates cars on a road. Assuming that the car moves at a constant velocity, there is no net force on the car. But in this case, if friction acts to accelerate the car, what force acts to retard the car's motion? Surely it can't be purely the wind resistance as that would depend solely on the vehicles speed, and would not necessarily cancel out the forward fricitional force.
Rolling resistance (which is different than static friction) and aerodyanmic drag. Wiki article for rolling resistance:siddharth5129 said:What force acts to retard the car's motion?
Thanks. That really cleared it out for me.rcgldr said:Rolling resistance (which is different than static friction) and aerodyanmic drag.
A car can be moving at a constant velocity when its speed and direction remain unchanged over time. This means that the car is moving in a straight line at a steady speed without any changes in its motion.
The main factor that affects a car's constant velocity is the presence of external forces such as friction, air resistance, and gravity. These forces can cause a car to slow down or change direction, thereby affecting its constant velocity.
Yes, a car's velocity can change even if its speed remains constant. This is because velocity takes into account the direction of motion, so if the car changes its direction, its velocity will also change.
A car's constant velocity refers to its speed and direction at a specific moment in time, while its average velocity takes into account its speed and direction over a period of time. A car's average velocity can change if its speed or direction changes during that time period, but its constant velocity will remain the same as long as its speed and direction are unchanged.
No, a car's constant velocity is not the same as its instantaneous velocity. Constant velocity refers to the car's speed and direction at a specific moment, while instantaneous velocity refers to the car's speed and direction at a specific point in time. Instantaneous velocity can change continuously, while constant velocity remains constant unless acted upon by external forces.