Home
Class 11
PHYSICS
Width of a river is 30 m, velocity is 2...

Width of a river is `30 m,` velocity is ` 2 m//s` and rowing velocity is `5 m//s` at `37^@` from the direction of river current find the time taken to cross the river.

Text Solution

Verified by Experts

The correct Answer is:
A, B, C


(a) Time taken to cross the river,
`t = (omega)/3=30/3=10s`
(b) Drift along the river
`x=(6)(t)=6xx10=60m`
Promotional Banner

Topper's Solved these Questions

  • KINEMATICS

    DC PANDEY|Exercise Example Type 1|1 Videos
  • KINEMATICS

    DC PANDEY|Exercise Example Type 2|1 Videos
  • GRAVITATION

    DC PANDEY|Exercise (C) Chapter Exercises|45 Videos
  • KINEMATICS 1

    DC PANDEY|Exercise INTEGER_TYPE|15 Videos

Similar Questions

Explore conceptually related problems

Width of a river is 30 m, velocity is 4 m//s and rowing velocity is 5 m//s (a) Make the velocity diagram for crossing the river in shortest time. Then, find this shortest time, net velocity of boatman and drigt along the river. (b) Can the boatman reach a point just oppsite on the other shore? If yes then make the velocity diagram, the direction in which the should row his boat and the time taken to cross the river in this case. (c) How long will it iake hom to row 10 m up the stream and then back to his starting point?

A person reaches on a point directly opposite on the other bank of a river.The velocity of the water in the river is 4 m//s and the velocity of the person in still water is 5 m//s .If the width of the river is 84.6m , time taken to cross the river in seconds is

A river is 20 m wide. River speed is 3 m//s. A boat starts with velocity 2sqrt2 m//s at angle 45^@ from the river current (relative to river) (a) Find the time taken by the boat to reach the opposite bank. (b) How far from the point directly opposite to the starting point does the boat reach the opposite bank?

The velocity of a boat in still water is 10 m//s .If water flows in the river with a velocity of 6 m//s what is the difference in times taken to cross the river in the shortest path and the shortest time.The width of the river is 80 m .

Velocity of boat in still water is 13 m/s. If water flows ina river with a velocity of 5 m/s. What is the difference in times taken by him to cross the river in the shortest path and in the shortest time. If the width of the river is 10 m.

A river 60m wide is flowing at a rate of 4m/s .A boat is sailing at a velocity of 20 m/s with respect to the river in a direction making an angle 37^(@) with the direction of river flow.Find time taken by the boat in seconds to reach the opposite bank. (A) 2 (B) 3 (C) sqrt(6) (D) 5

A swimmer can swim with 5ms^(-1) in still water. He wants to cross a river having width 200m heading perpendicular to the flow. Speed of flow is uniformly increasing from zero at side to 3ms^(-1) at mid from both side of the river. Then the time taken by the swimmer to cross the river will be

A river flows at 3 m/s and is 300 m wide . A man swing across the rivers with a velocity of 2 m/s directed always perpendicular to the flow of current . (a) How long does it take the man to cross the river ? (b) In what direction does he actually moves to cross the relative to the shore ? (c) How far down the fiver(from the starting point ) does he reach the opposite bank?

A swimmer starts to swim from point a to cross a river. He wants to reach point B on the opposite side of the river. The line AB makes an angle 60^(@) with the river flow as shown. The velocity of the swimmer in still water is same as that of the water (i) In what direction should he try to direct his velocity ? Calculate angle between his velocity ? Calculate angle between his velocity and river velocity. (ii) Find the ratio of the time taken to cross the river in this situation to the minimum time in which he can cross this river.