[b] The car changes speed to travel a distance of 30 m in a time of 2 s. Calculate the new speed of the car. [3] 相关知识点: 试题来源: 解析 [a] 汽车的平均速度是 35 m/s。 [b] 汽车的新速度是 15 m/s。 [a] 汽车的平均速度等于行驶距离除以行驶时间,即 70 米 / 2 秒 = 35...
(60)-x)=210x=1.75因此,该 汽车由P城驶至Q城需时1.75小时.The time required for the car to travel from city P to city Q-(900)/(900))-210=1.75 hours.该汽车由P城驶至Q城的所需时间-(900)/(900))-210=1.75小时.Let ykm be the distance between city P and city Q.Then, the distance...
For example, some people buy cars for work needs. These car owners often drive long distances, each year the car travels at least 20,000 km. Others buy cars just for running some errands, not even driving 10,000 km/year. How many miles does the average person drive a year (Photo: wi...
Average mileage per year is the amount of miles motorists typically travel each year. Understanding average mileage per year helps you make smarter purchase decisions.
A rushing ambulance which is carrying an injured patient is approaching the hospital with a distance from the accident scene defined by x(t) = bt2- ct3, where b = 3.10 m/s2and c = 0.147 m/s3. Determine the average velocity of the ambulance for t = 0 to t = 7.0 s. ...
百度试题 结果1 题目 (2) A car travels at an average of 70 kilometres per hour. It will trave(175) kilometres in 2.5 hours and (70t) kilometres in t hours. 相关知识点: 试题来源: 解析 答案见上 反馈 收藏
百度试题 结果1 题目 3 A car travels 300 metres in 20 seconds.Find the average speed of the car in(a) metres per second,15m/s[1](b) kilometres per hour.54...km/h[2] 相关知识点: 试题来源: 解析 1554 反馈 收藏
One long-distance flight consumes fuel which a car uses in several years' time, but they cause the same amount of pollution. So, some people think that we should discourage non-essential flights, such as tourist travel, rather than limit the use of cars. To what extent do you agree or ...
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A car travels a distance AB at a speed of 40 km/hr and returns to A at a speed of 30 km/hr. What is the average speed for the whole journey? View Solution A motorist travels to a place 150 km away at an average speed of 50 km/hour and returns at 30 km/hour. What is the ...