The range of a projectile is 100 m. Its kinetic energy will be maximum after covering a distance of

Two cars A and B are moving with a velocity of 30 km/h in the same direction. They are separated by 10 km. The speed of another car C moving in the opposite direction, if it meets these two cars at an interval of eight minutes is

A book is lying on a table. What is the angle between the normal reaction acting on the book on the table and the weight of the book?

A boy throws a cricket ball from the boundary to the wicket keeper. If the frictional force due to air $$(f_a )$$ cannot be ignored, the forces acting on the ball at the position X are represented by