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Question Number 26424 by tawa tawa last updated on 25/Dec/17

$$\mathrm{The}\mathrm{front}\mathrm{of}\mathrm{a}\mathrm{train}80\mathrm{m}\mathrm{long}\mathrm{passes}\mathrm{a}\mathrm{signal}\mathrm{at}\mathrm{a}\mathrm{speed}\mathrm{of}72\mathrm{km}/\mathrm{hr}.\mathrm{If}\mathrm{the}$$$$\mathrm{rear}\mathrm{of}\mathrm{the}\mathrm{train}\mathrm{passes}\mathrm{the}\mathrm{signal}5\mathrm{s}\mathrm{later},\mathrm{Find}$$$$\left(\mathrm{a}\right)\mathrm{The}\mathrm{magnitude}\mathrm{of}\mathrm{the}\mathrm{acceleration}\mathrm{of}\mathrm{the}\mathrm{train}.$$$$\left(\mathrm{b}\right)\mathrm{The}\mathrm{speed}\mathrm{at}\mathrm{which}\mathrm{the}\mathrm{rear}\mathrm{of}\mathrm{the}\mathrm{train}\mathrm{passes}\mathrm{the}\mathrm{signal}.$$

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