A truck travelling due north at 20 ,m/s turns west and travels at same speed. change in its velocity

English

Gujarati

Hindi

3-2.Motion in Plane

medium

A truck travelling due north at $20 \,m/s $ turns west and travels at the same speed. The change in its velocity be

A$40\, m/s \,N-W$

B$20\sqrt 2 \, m/s\, N-W$

C$40\, m/s\, S-W$

D$20\sqrt 2 \,m/s \,S-W$

Solution

(d) From figure
$\vec v _1 = 20\hat j$ and $\vec v _2 = – 20\hat i$
$\Delta \vec v = \vec v _2 – \vec v _1 = – 20(\hat i + \hat j)$
$|\Delta \vec v |\, = \,20\sqrt 2 $ and direction
$\theta = {\tan ^{ – 1}}(1) = 45^\circ $ i.e. $S – W$

Standard 11

Physics

A particle moves in east direction with $15 \,m/sec$. for $2\, sec$ then moves northward with $5\, m/sec$. for $8 \,sec$. then average velocity of the particle is

medium

Starting from the origin at time $t=0,$ with initial velocity $5 \hat{ j }\, ms ^{-1},$ a particle moves in the $x-y$ plane with a constant acceleration of $(10 \hat{ i }+4 \hat{ j })\, ms ^{-2}$. At time $t$, its coordinates are $\left(20\, m , y _{0}\, m \right) .$ The values of $t$ and $y _{0},$ are respectively

medium

(JEE MAIN-2020)

Motion of a particle in $x – y$ plane is described by a set of following equations $x=4 \sin \left(\frac{\pi}{2}-\omega t\right) m$ and $y=4 \sin (\omega t) m$. The path of particle will be

medium

(JEE MAIN-2022)

A boy walks uniformally along the sides of a rectangular park of size $400\, m × 300\, m$, starting from one corner to the other corner diagonally opposite. Which of the following statement is incorrect

medium

A car travels $6\, km$ towards north at an angle of $45^o$ to the east and then travels distance of $4\, km$ towards north at an angle $135^o$ to east. How far is the point from the starting point? What angle does the straight line joining its initial and final position makes with the east?

medium

(AIIMS-2008)

A truck travelling due north at $20 \,m/s $ turns west and travels at the same speed. The change in its velocity be

Solution

Similar Questions

A particle moves in east direction with $15 \,m/sec$. for $2\, sec$ then moves northward with $5\, m/sec$. for $8 \,sec$. then average velocity of the particle is

Motion of a particle in $x – y$ plane is described by a set of following equations $x=4 \sin \left(\frac{\pi}{2}-\omega t\right) m$ and $y=4 \sin (\omega t) m$. The path of particle will be

A boy walks uniformally along the sides of a rectangular park of size $400\, m × 300\, m$, starting from one corner to the other corner diagonally opposite. Which of the following statement is incorrect

A car travels $6\, km$ towards north at an angle of $45^o$ to the east and then travels distance of $4\, km$ towards north at an angle $135^o$ to east. How far is the point from the starting point? What angle does the straight line joining its initial and final position makes with the east?

Start a Free Trial Now