英文的,请尽量用英文回答~Describe the principles which determine whether a car will stay on the road when rounding a bend,using an appropriate equation to support your answer
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英文的,请尽量用英文回答~Describe the principles which determine whether a car will stay on the road when rounding a bend,using an appropriate equation to support your answer
英文的,请尽量用英文回答~
Describe the principles which determine whether a car will stay on the road when rounding a bend,using an appropriate equation to support your answer
英文的,请尽量用英文回答~Describe the principles which determine whether a car will stay on the road when rounding a bend,using an appropriate equation to support your answer
Pinciple:
Newton's 1st law:An object at rest remains at rest,unless acted upon by a net force.An object in motion remains in motion,unless acted upon by a net force.
Newton’s 3rd Law:To every action,there is an equal and opposite reaction.
Let the acceleration be a,F-friction=b(friction relates to the roughness of the surface area in-contact with the object),we can come out with the equation:
resultant force= a-b,
case1:when a is smaller than b,there will be negative acceleration(retardation),as speed decreases,the car will likely to stay on the road.
case2:when a is bigger than b,there will be an acceleration,the car keeps accelerating while rounding the bend,it will likely to turn over
case 3:when a=b,the car keeps moving at constant speed,it is at risk to turnover
PS:如果要更详细的解释就需要讲到mass,mass determines inertia(in newton's 1st law and 2nd law),tendency of an object to remain at a constant velocity,or its resistance to being accelerated.还有另外一个公式 Force=mass*acceleration(F=ma),如上述中的 frction 和 resultant force 是由此而来的
friction