PHYSICS [5 Mark Question Answer]

Difference between mass and weight.

Mass		Weight
1.	Mass is the amount of matter contained in a body.	1.	Weight is the force with which the earths attracts a body towards its centre.
2.	Mass is a scalar quantity	2.	Weight is a vector quantity.
3.	Sl unit of mass is Kilogram (Kg).	3.	Sl unit of Weight is Newton (N).
4.	Mass of a body can never be zero.	4.	Weight of a body can be zero.

(a) The rate of change of motion is called speed.
(b) The rate of change of motion in a specified direction is called its velocity.
The difference between speed and velocity –

Speed		Velocity
1.	The rate of change of motion is called speed.	1.	The rate of change of motion in a specified direction is called its velocity
2.	It is a scalar quantity.	2.	It is a vector quantity.
3.	It cannot be zero.	3.	It can be zero.
4.	Speed = Distance/Time	4.	Velocity = Displacement/Time