A swimmer crosses the river along the line making

Asked by admin @ 20/08/2021 in Physics viewed by 285 People

A swimmer crosses the river along the line making an angle 45 degree with the direction of flow of river. if velocity of river is 5m/s and time taken by him is 6 seconds to cross width of river 60m. then find the velocity of swimmer w.r.t. to river

Answered by admin @ 20/08/2021

Let the river flow along y direction with a velocity of 5 j m/s.
Let the swimmer crossover along the vector: i + j (at 45°)
displacement of swimmer just after crossing = 60 i + 60 j meters

The speed of swimmer wrt to stationary observer
= (60 i + 60 j) / 6 m/s = 10 i + 10 j m/s

velocity of swimmer relative to the river = 10 i + 10 j - 5 j
= 10 i + 5 j m/s

magnitude of velocity relative to river = 5√5 m/s

A hair dryer with a resistance of 9.6 ohms operates at 120 volts for 2.5 minutes. the total electrical energy used by the dryer during this time interval is

Asked by maham237 @ 13/01/2021 in Physics viewed by 1204 persons

Mind map for light reflection and refraction class 10

Asked by admin @ 23/08/2021 in Physics viewed by 1146 persons

The african cicada is the world's loudest insect, producing a sound intensity level of 107 db at a distance of 0.50 m. what is the intensity of its sound (in w/m2) as heard by someone standing 3.1 m away? express your answer in watts per meter squared.

Asked by maham237 @ 10/01/2021 in Physics viewed by 1099 persons

A thief runs at a speed of 10m s

Asked by admin @ 23/08/2021 in Physics viewed by 1095 persons

A 5.8 x 10 4 watt elevator motor can lift

Asked by maham237 @ 20/06/2021 in Physics viewed by 1080 persons

A swimmer crosses the river along the line making

Similar Questions

Which river crosses the tropic of cancer twice

A particle moves along a straight line ox

The motion of a particle along a straight line

Explain why steel is used to make railway lines

How did the instructor make douglas a good swimmer

Write numbers to make each line have the same sum

These factors make the danube river important to eastern europe

What substance in the esophagus lining helps make swallowing easier

In which line did the student make the first mistake?

While crossing the idl what changes will you make

How did cataracts in the nile river make transportation difficult

A swimmer crosses a flowing stream of width w

A cart is moving horizontally along a straight line

A car is moving horizontally along a straight line

Two electric field lines never cross each other why

Most viewed questions in Physics

Jeevandeep health and physical education std 10 answers pdf

Hc verma physics class 9 solutions of describing motion

How to leave nightmare land answer key

Base area and stability of some objects with different shapes

Which of the following statements about safe lifting are correct

Porous water-absorbing mass of fibers

Absorption of water by filter paper is due to

A composite wire of uniform diameter 3mm

At a distance l 400m from the traffic light

A rocket of mass m is launched straight up with thrust f⃗ thrust.

A hair dryer with a resistance of 9.6 ohms operates at 120 volts for 2.5 minutes. the total electrical energy used by the dryer during this time interval is

Mind map for light reflection and refraction class 10

The african cicada is the world's loudest insect, producing a sound intensity level of 107 db at a distance of 0.50 m. what is the intensity of its sound (in w/m2) as heard by someone standing 3.1 m away? express your answer in watts per meter squared.

A thief runs at a speed of 10m s

A 5.8 x 10 4 watt elevator motor can lift