The cartesian equation of trajectory is(where u = Velocity of projection, α = Angle of projection, and x, y = Co-ordinates of any point on the trajectory after t seconds.)

A number of forces acting at a point will be in equilibrium, if

The forces, whose lines of action are parallel to each other and act in the same directions, are known as

D' Alembert's principle basically depends upon Newton's second law of motion.

Two blocks A and B of masses 150 kg and 50 kg respectively are connected by means of a string as shown in the below figure. The tension in all the three strings __________ be same.