1. A man can swim in still with a velocity of 4ms-1. He crosses a river directly perpendicular to the river when he heads 30o with the normal to the riverbank. The velocity of the river is
3. Two vectors have a sum A and a difference B. If A = B then the angle between the two vectors is
Three vectors satisfy the relation A.B=0 and A.C=0, then A is parallel to
If the magnitude of the resultant of two vectors is equal to the magnitude of either of the two vectors, the two vectors should be inclined at an angle of
A bus is moving along a straight road towards the north with a uniform speed of 50kmh-1, if its speed remains unchanged after turning, the increase in velocity of the bus in the turning process is
What is the minimum number of unequal forces whose resultant will be zero?
The resultant of two equal forces inclined at an angle α is half of resultant when they are inclined at the angle β, then
Which of the following is not a vector quantity?
Consider the quantities: Pressure, Power, Impulse, Area, Temperature and Gravitational Potential. Out of these, the vector quantities are
Five equal forces of 10 N are applied at a point. If the angle between them is equal, what is the resultant force?
Which of the following is not a vector quantity?
Two forces of 200N and 120N are inclined at an angle of 600. The resultant force will be
If the angle between two vectors (both having a non-zero magnitude) is greater than 900 and smaller than 2700, then the scalar product of these vectors is
If the resultant force is forming an angle of 450, then the two components are
Two vectors lie with their tails at some point. When the angle between them is increased by 200, the magnitude of their vector products doubles. The original angle between them was about
A person walks first 10 km north and 20 km east, then the resultant vector is
What is the dot product of two vectors of magnitude 3 and 5 is the angle between them is 600