Can a car be considered a material point when determining the path that has passed in 2 hours

| January 12, 2021 | education

Can a car be considered a material point when determining the path that has passed in 2 hours, moving at an average speed of 80 km / h? when overtaking another car?

A body can be considered a material point in the case when its dimensions are much less than the distance that this body travels. When the shape, size of the body can be neglected, they do not play a significant role.
The car travels in t = 2 hours at a speed of V = 80 km / h, the path S = V * t = 80 km / h * 2 h = 160 km.
The dimensions of the car are much smaller than the distance traveled, so it can be considered a material point.
When overtaking, the car cannot be considered a material point. Since the distance at which overtaking takes place is commensurate with the size of the car. The overtaking vehicle must travel a little longer than the overtaking vehicle.



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