Chapter 5 – Relative Motion
A man takes 3h to cover a certain distance along the flow and takes 6h to cover the same distance opposite to flow. In how much time, he will cross this distance in still water.
20
Oct
A man takes 3h to cover a certain distance along the flow and takes 6h to cover the same distance opposite to flow. In how much time, he will cross this distance in still water. A man takes 3h to cover a certain distance along the flow and takes 6h to cover the same distance [...]
A cart is moving horizontally along a straight line with constant speed 30ms^−1. A particle is to be fired vertically upwards from the moving cart in such a way that it returns to the cart at the same point from where it was projected after the cart has moved 80m. At what speed (relative to the cart) must the projectile be fired? (Take g=10ms^−2)
20
Oct
A cart is moving horizontally along a straight line with constant speed 30ms^−1. A particle is to be fired vertically upwards from the moving cart in such a way that it returns to the cart at the same point from where it was projected after the cart has moved 80m. At what speed (relative to [...]
Six particles situated at the corners of a regular hexagon of side a move at a constant speed v. Each particle maintains a direction towards the particle at the next corner. The time the particles will take to meet each other.
20
Oct
Six particles situated at the corners of a regular hexagon of side a move at a constant speed v. Each particle maintains a direction towards the particle at the next corner. The time the particles will take to meet each other. B B along BC C along CD and D along DA. At which time [...]
Four particles A, B, C and D are situated at the vertices of a rectangle of sides d at t = 0. Each of the particle moves with constant speed v. A always has its velocity along AB, B along BC, C along CD and D along DA. At which time will the particles meet each other ?
20
Oct
Four particles A, B, C and D are situated at the vertices of a rectangle of sides d at t = 0. Each of the particle moves with constant speed v. A always has its velocity along AB, B along BC, C along CD and D along DA. At which time will the particles meet [...]
A man can swim with velocity v relative to water.He has to cross a river of width d flowing with a velocity u(u>v). The distance traveled by man along the flow is x, when he reaches to opposite bank. For x to be minimum the person should swim at an angle alpha with the direction of the flow of water, where alpha is
16
Sep
A man can swim with velocity v relative to water.He has to cross a river of width d flowing with a velocity u(u>v). The distance traveled by man along the flow is x, when he reaches to opposite bank. For x to be minimum the person should swim at an angle alpha with the direction [...]
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A man can swim with velocity v relative to water.He has to cross a river of width d flowing with a velocity u(u>v). The distance traveled by man along the flow is x ,
when he reaches to opposite bank. For x to be minimum the person should swim at an angle alpha with the direction of the flow of water ,
where alpha is ,
A river is flowing from west to east at a speed of 5 metre per minute. A man on the south bank of the river , capable of swimming at 10 metre per minute, in still water , wants to swim across the river in the shortest time . He should swim
16
Sep
A river is flowing from west to east at a speed of 5 metre per minute. A man on the south bank of the river , capable of swimming at 10 metre per minute, in still water , wants to swim across the river in the shortest time . He should swim A river is [...]
A river is flowing from west to east with a speed of 5m/min. A man can swim in still water with a velocity 10m/min. In which direction should the man swim so as to take the shortest possible path to go to the south.
16
Sep
A river is flowing from west to east with a speed of 5m/min. A man can swim in still water with a velocity 10m/min. In which direction should the man swim so as to take the shortest possible path to go to the south. A particle is projected at an angle with horizontal. If T [...]
A man can swim at a speed of 3 km/h in still water. He wants to cross a 500 m wide river flowing at 2 km/h. He keeps himself always at an angle of 120 with the river flow while swimming.the time he takes to cross the river is.
08
Sep
A man can swim at a speed of 3 km/h in still water. He wants to cross a 500 m wide river flowing at 2 km/h. He keeps himself always at an angle of 120 with the river flow while swimming.the time he takes to cross the river is. A boat is sent across a [...]
A man can swim in still water at a speed of 3 km/h. he want to cross a river that flows at 2 km/h and reach the point directly opposite to his starting point. In which direction should he try to swim . How much time will he take to cross the river if the is 500 m wide ?
08
Sep
A man can swim in still water at a speed of 3 km/h. he want to cross a river that flows at 2 km/h and reach the point directly opposite to his starting point. In which direction should he try to swim . How much time will he take to cross the river if the [...]
A man crosses a 320 m wide river perpendicular to the current in 4 min. If in still water he can swim with a speed 5/3 times that of the current, then the speed of the current, in m/min is
08
Sep
A man crosses a 320 m wide river perpendicular to the current in 4 min. If in still water he can swim with a speed 5/3 times that of the current, then the speed of the current, in m/min is A man crosses a 320 m wide river perpendicular to the current in 4 min. [...]