Chapter 5 – Relative Motion

The speed of boat is 5 Km/h in still water. It crosses a river of width 1 Km along shortest possible path in 15 min. The velocity of river water is The speed of boat is 5 Km/h in still water. It crosses a river of width 1 Km along shortest possible path in 15 [...]

A river 500 m wide is flowing at a rate of 4 m/s. A boat is sailing at a velocity of 10 m/s with respect to the water, in a direction perpendicular to the river. The time taken by the boat to reach the opposite bank A river 500 m wide is flowing at a [...]

A boat is sent across a river with a velocity of 8 kmh^−1. If the resultant velocity of the boat is 10 kmh^−1, the river is flowing with a velocity of A boat is sent across a river with a velocity of 8 kmh^−1. If the resultant velocity of the boat is 10 kmh^−1 the [...]

A boat is moving with velocity 3i + 4j with respect to ground. The water in the river is moving with velocity – 3i – 4j with respect to ground. The relative velocity of the boat with respect to water is Rain is falling vertically downwards with velocity 4 m/s. A man is moving horizontal [...]

A particle A is at origin and particle B is at distance y = − d at t = 0. They move with constant velocity v, A towards positive x-axis and B towards origin. The time at which distance between them is minimum and minimum distance will be A particle A is at origin and [...]

A ship is travelling due east at a speed of 15 km/h. Find the speed of a boat heading 30 east of north if it appears always due north from the ship. A ship is travelling due east at a speed of 15 km/h. Find the speed of a boat heading 30 east of north [...]

Two boys are standing at the ends A and B of a ground, where AB = a. The boy at B starts running in a direction perpendicular to AB with velocity v1​. The boy at A starts running simultaneously with velocity v and catches the other boy in a time t, where t is Two [...]

Rain is falling vertically downwards with velocity 4 m/s. A man is moving horizontal with velocity 3 m/s. The velocity of rain respect to the man is Rain is falling vertically downwards with velocity 4 m/s. A man is moving horizontal with velocity 3 m/s. The velocity of rain respect to the man is September [...]

A car A is going north east at 80 kmh^-1 and another car B is going south east with a velocity of 60kmh^−1. the direction of the velocity of A relative to B makes an angle with the north equal to: A car A is going north east at 80 kmh^-1 and another car B [...]

A car A moves along north with velocity 30 km/h and another car B moves along east with velocity 40 km/h. The relative velocity of A with respect to B is A car A moves along north with velocity 30 km/h and another car B moves along east with velocity 40 km/h. The relative velocity [...]