Question:
A train of $150 \, m$ length is going towards north direction at a speed of $10 \, ms^{-1}$. A parrot flying at the speed of $5 \, ms^{-1}$ towards south direction parallel to the railway track. The time taken by the parrot to cross the train is equal to
A train of $150 \, m$ length is going towards north direction at a speed of $10 \, ms^{-1}$. A parrot flying at the speed of $5 \, ms^{-1}$ towards south direction parallel to the railway track. The time taken by the parrot to cross the train is equal to
Updated On: Jun 7, 2022
- 15 s
- 12 s
- 10 s
- 8 s
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The Correct Option is C
Solution and Explanation
${Time\, taken = \frac{distance}{relative \, velocity} = \frac{150}{10 + 5}}$ = 10 s
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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.
- Non-Uniform linear motion with variable velocity or non-zero acceleration: Not like the uniform acceleration, the body is said to have a non-uniform motion when the velocity of a body changes by unequal amounts in equal intervals of time. The rate of change of its velocity changes at different points of time during its movement.