A flag is mounted on a car moving due North w | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(C) The velocity of the car is $\vec{v}_c = 20 \hat{j} \, km/hr$ (North).The velocity of the wind is $\vec{v}_w = 20 \hat{i} \, km/hr$ (East).The flag

Vedclass · Accepted Answer

South-East

Vedclass · Answer

(C) The velocity of the car is $\vec{v}_c = 20 \hat{j} \, km/hr$ (North).The velocity of the wind is $\vec{v}_w = 20 \hat{i} \, km/hr$ (East).The flag points in the direction of the relative velocity of the wind with respect to the car,which is $\vec{v}_{wc} = \vec{v}_w - \vec{v}_c$.$\vec{v}_{wc} = 20 \hat{i} - 20 \hat{j}$.The direction of this vector is given by $	an 	heta = \frac{|v_y|}{|v_x|} = \frac{20}{20} = 1$,so $	heta = 45^\circ$.Since the $x$-component is positive (East) and the $y$-component is negative (South),the resultant direction is South-East.

$A$ flag is mounted on a car moving due North with a velocity of $20 \, km/hr$. Strong winds are blowing due East with a velocity of $20 \, km/hr$. The flag will point in which direction?

Similar Questions

$A$ man sitting in a bus travelling from west to east with a speed of $40 \, km/h$ observes that the rain-drops are falling vertically down. To another man standing on the ground,the rain will appear:

$A$ person aiming to reach the exactly opposite point on the bank of a stream is swimming with a speed of $0.5\, m/s$ at an angle of $120^\circ$ with the direction of flow of water. The speed of water in the stream is..........$m/s$.

$A$ $120 \, m$ long train is moving towards west with a speed of $10 \, m/s$. $A$ bird flying towards east with a speed of $5 \, m/s$ crosses the train. The time taken by the bird to cross the train will be ........ $sec$.

$A$ person climbs up a stalled escalator in $60\,s$. If standing on the same but escalator running with constant velocity,he takes $40\,s$. How much time is taken by the person to walk up the moving escalator?........$s$

An aeroplane is to go along a straight line from $A$ to $B$,and back again. The relative speed with respect to wind is $V$. The wind blows perpendicular to the line $AB$ with speed $v$. The distance between $A$ and $B$ is $\ell$. The total time for the round trip is:

Vedclass Test Series

Exam Paper Generator

Online Exam Module