The difference between speed and velocity is that velocity includes

speed is a scalar quantity i.e they only possess magnitude but no direction compared to velocity being a vector quantity has both magnitude and direction.

Explanation:

It is evident that speed are used interchangeably with velocity and this is majorly due to the similarities in their units but they have their differences as well in that speed is a scalar quantity i.e they only possess magnitude but no direction compared to velocity being a vector quantity which has both magnitude and direction.

Also, speed has to do with rate of change of distance and velocity is rate of change of displacement.

Speed is scalar and Velocity is Vector

hope this helps...

Explanation:

d

explanation:

v=uf/(u-f)

= 5.10/(5-10) convex lens has positive focal length

=50/-5

=-10 cm (formed at other side)

the answer is b, have negligible mass