Question

Pathshala Nepal

2 years ago Grade - 8 (BLE) Physics Motion

What is the difference between speed and velocity?

1 Answer

If a body changes its position with respect to the surrounding objects, then the body is said to be in motion.
If a body does not change its position with respect to the surrounding objects, then the body is said to be at rest.
The fixed point, about which we describe the motion of a body is called the reference point.
The physical quantity having only magnitude but not a fixed direction is called a scalar quantity.
The physical quantity having both magnitude and direction is called a vector quantity.
Distance is the total length between two points. Its SI unit is m.
Displacement is the shortest between the initial and final points. Its SI unit is also a meter.
The rate of the change of distance is called speed and the rate of change of the displacement is called the velocity.
Speed is a scalar quantity but velocity and acceleration is a vector quantity.
If a body covers an equal distance in an equal interval of time, then the motion of the body is called uniform motion.
If a body doesn't cover an equal distance in an equal interval of time, then the motion of the body is called a variable or non-uniform motion.
The motion of a body relative to another object or the reference frame is called relative motion.

Physical Quantities 27 Electricity & Magnetism 48 Motion 8 Measurement 4 Electricity 166 Physical Optics 80 Waves 117 Force 51 Heat 137 Laws of Motion 1 Light 100 Pressure 139 Thermodynamics 1

SN	Speed	Velocity
1.	It is the rate of change of distance.	It is the rate of change of displacement.
2.	speed is always positive.	velocity may be positive, negative, or zero.
3.	It is a scalar quantity.	Velocity is a vector quantity.

What is the difference between speed and velocity?