Question:
A passenger train of length $60\,m$ travels at a speed of $80\, km/hr$. Another freight train of length $120\, m$ travels at a speed of $30\, km/hr$. The ratio of times taken by the passenger train to completely cross the freight train when :
(i) they are moving in the same direction, and
(ii) in the opposite directions is :
A passenger train of length $60\,m$ travels at a speed of $80\, km/hr$. Another freight train of length $120\, m$ travels at a speed of $30\, km/hr$. The ratio of times taken by the passenger train to completely cross the freight train when :
(i) they are moving in the same direction, and
(ii) in the opposite directions is :
Updated On: Oct 1, 2024
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The Correct Option is D
Solution and Explanation
$t _{1}=\frac{ x }{ v - u }=\frac{ x }{50} $
$t _{2}=\frac{ x }{ v + u }=\frac{ x }{100} $
$\frac{ t _{1}}{ t _{2}}=\frac{11}{5}$
$t _{2}=\frac{ x }{ v + u }=\frac{ x }{100} $
$\frac{ t _{1}}{ t _{2}}=\frac{11}{5}$
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Concepts Used:
Motion in a straight line
The motion in a straight line is an object changes its position with respect to its surroundings with time, then it is called in motion. It is a change in the position of an object over time. It is nothing but linear motion.
Types of Linear Motion:
Linear motion is also known as the Rectilinear Motion which are of two types:
- Uniform linear motion with constant velocity or zero acceleration: If a body travels in a straight line by covering an equal amount of distance in an equal interval of time then it is said to have uniform motion.
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