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Question: please show workingandnbsp1 a boy ran 100 m in 119...

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 1) A boy ran 100 m in 11.9 s. If after 20 m the stop watch showed 3.1 s, what was the average speed in the last 80 m? 

 

 

 2) Someone is running at a velocity of 2.2 m/s. Approaching the end, he accelerates at 0.8 m/s2 for 9.4 s before passing the end line. What distance did he cover while accelerating? 

 

 

3) A rugby player is running at the velocity of 2.9 m/s. The ball, which is stationery, is 15 m away from him when he starts to accelerate at a rate of 4.5 m/s2. What speed will he have when he arrives at the ball? 

 

 

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