NEET Chemistry Structure Of Atom Motion Of A Boat In River MCQs

A boat can travel at a speed of 8 kmph in still water on a lake. In the flowing water of a stream, it can move at 8kmph relative to the water in the stream. If the stream speed is 3kmph, how fast can the boat move past a tree on the shore in travelling (i) upstream (ii) downstream?

A boat can travel at a speed of 8 kmph in still water on a lake. In the flowing water of a stream, it can move at 8kmph relative to the water in the stream. If the stream speed is 3kmph, how fast can the boat move past a tree on the shore in travelling (i) upstream (ii) downstream?

The magnitude of resultant of three vectors of magnitude 1, 2 and 3 whose directions are those of the sides of an equilateral triangle taken in order is

The magnitude of resultant of three vectors of magnitude 1, 2 and 3 whose directions are those of the sides of an equilateral triangle taken in order is

If ${\rm{\vec A}} + {\rm{\vec B}} = {\rm{\vec C}}\,and\,A = \sqrt 3 ,\,B = \sqrt 3 \,and\,C = 3$, then the angle between ${\rm{\vec A}}\;and\;{\rm{\vec B}}$ is

Following forces start acting on a particle at rest at the origin of the co-ordinate system simultaneously ${{\rm{\vec F}}_1} = 5\hat i - 5\hat j + 5\hat k,{\rm{\;\;\;}}{{\rm{F}}_2} = 2\hat i + 8\hat j + 6\hat k,{{\rm{F}}_3} = - 6\hat i + 4\hat j - 7\hat k,{{\rm{F}}_4} = - \hat i - 3\hat j - 2\hat k.$ The particle will move

Following forces start acting on a particle at rest at the origin of the co-ordinate system simultaneously ${{\rm{\vec F}}_1} = 5\hat i - 5\hat j + 5\hat k,{\rm{\;\;\;}}{{\rm{F}}_2} = 2\hat i + 8\hat j + 6\hat k,{{\rm{F}}_3} = - 6\hat i + 4\hat j - 7\hat k,{{\rm{F}}_4} = - \hat i - 3\hat j - 2\hat k.$ The particle will move

The sum of the magnitudes of two forces acting at a point is 16 N. the resultant of these forces is perpendicular to the smaller force has a magnitude of 8 N. If the smaller force is magnitude x, then the value of x is

The sum of the magnitudes of two forces acting at a point is 16 N. the resultant of these forces is perpendicular to the smaller force has a magnitude of 8 N. If the smaller force is magnitude x, then the value of x is

Two forces, each equal to $\frac{P}{2}$, act at right angles. Their effect may be neutralized by a third force acting along their bisector in the opposite direction with a magnitude of