Question 36:
(a) Define velocity. What is the SI unit of velocity ?
(b) What is the difference between speed and velocity ?
(c) Convert a speed of 54 km/h into m/s.
Lakhmir Singh Physics Class 9
Answers
Answered by
16
(a) Velocity is the displacement of an object per
unit time.The si unit of velocity is m/s.
(b) speed is a scalar quantity means it has only magnitude and velocity is a vector quantity means that it has both magnitude as well as direction.
(c) 54km/h= 54000m/3600s
=15m/s
unit time.The si unit of velocity is m/s.
(b) speed is a scalar quantity means it has only magnitude and velocity is a vector quantity means that it has both magnitude as well as direction.
(c) 54km/h= 54000m/3600s
=15m/s
Answered by
7
a) distance travelled by a body per unit time in a particular direction
It's SI unit is m/s
b)SPEED defines us how fast the object is moving whereas VELOCITY tells us the distance travelled in a given direction
SPEED has no direction
VELOCITY has direction
c)54 km/h
= 54×1000/60×60
=15 m/s
It's SI unit is m/s
b)SPEED defines us how fast the object is moving whereas VELOCITY tells us the distance travelled in a given direction
SPEED has no direction
VELOCITY has direction
c)54 km/h
= 54×1000/60×60
=15 m/s
Similar questions