Question

two trains are moving towards each other at velocities of 36 km/h and 54km/h. A passenger in the first train observers that the second train passes his train in a time interval of 6 seconds. What is the length a) the second train?​

Answer 1

Відповідь:

Пояснення:

t = 6 sec, $V_{1} = 36 km/h = 10 m/sec, V{2} = 54 km/h = 15 m/sec$

$L_{2} = t*V_{s}$  the second train length formula

$V_{s} = V_{1} + V_{2}$  because of moving towards each other

$L_{2} = t*(V_{1} + V_{2} )$ the general formula

$L_{2} = 6*(10+15) = 150 (m)$  

Answer: 150 m