KinematicsHard
Question
A river is flowing west east at a speed of 5 meters per minute. a man standing on the south bank of the river , capable of swimming at 10 meters per minute in still water, wants to swim across the river the shortest time He should swim in which direction : -
Options
A.Due north
B.30o east of north
C.30o north of west
D.60o east of north
Solution
For shortest time to cross, velocity should be maximum towards north as river velocity does not take any part to cross.
Create a free account to view solution
View Solution FreeMore Kinematics Questions
The velocity of a particle is v = v0 + gt + ft2. If its position is x = 0 at t = 0, then its displacement after unit tim...A boy thrown a ball into air at $45^{\circ}$ from the horizontal to land it on a roof of a building of height H . If the...A point move in a straight line under the retardation av2. If the initial velocity is u, distance covered in ‘t’ seconds...A particle has an initial velocity of (3î + 4ĵ) m/s and a constant acceleration of (4î - 3ĵ) m/s2. I...A particle is projected vertically upwards and it reaches the maximum height H in T seconds. The height of the particle ...