A scalar quantity is defined as the physical quantity that has only magnitude, for example, mass, energy and electric charge.

On the other hand, a vector quantity is defined as the physical quantity that has both magnitude as well as direction like force, weight, acceleration, momentum and velocity.

Water drops do not stick to the oily surface due to??lack in adhesive

Newton’s first law of motion states that everybody continues in the state of rest or of uniform motion, in a straight line, unless it is acted upon by some external force. Newton's first law is also called as law of inertia.

A man inside an artificial satellite feels weightlessness because the force of attraction due to earth is?zero at center