Question:
A river is flowing from west to east with a speed $5\,m\,s^{-1}$. A swimmer can swim in still water at a speed of $10\,ms^{-1}$.
If he wants to start from point $A$ on south bank and reach opposite point $B$ on north bank, in what direction should he swim?
A river is flowing from west to east with a speed $5\,m\,s^{-1}$. A swimmer can swim in still water at a speed of $10\,ms^{-1}$.
If he wants to start from point $A$ on south bank and reach opposite point $B$ on north bank, in what direction should he swim?
Updated On: Jul 6, 2022
- $30^?$ east of north
- $60^?$ east of north
- $30^?$ west of north
- $60^?$ west of north
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The Correct Option is C
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Notes on Motion in a plane
Concepts Used:
Motion in a Plane
It is a vector quantity. A vector quantity is a quantity having both magnitude and direction. Speed is a scalar quantity and it is a quantity having a magnitude only. Motion in a plane is also known as motion in two dimensions.
Equations of Plane Motion
The equations of motion in a straight line are:
v=u+at
s=ut+½ at2
v2-u2=2as
Where,
- v = final velocity of the particle
- u = initial velocity of the particle
- s = displacement of the particle
- a = acceleration of the particle
- t = the time interval in which the particle is in consideration