A police car at rest,passed by a speeder travelling at a constant 96 km h-1,takes off in hot pursuit
计算警车追上这辆车所需时间（s）.
96 km h-1=80/3 m·s-1
t=750/(80/3)=28.125 s
计算警车追上这辆车所需时间（s）.
96 km h-1=80/3 m·s-1
t=750/(80/3)=28.125 s
计算警车追上这辆车所需时间（s）.
96 km h-1=80/3 m·s-1
t=750/(80/3)=28.125 s
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