Question

A body goes from 2m to 12m mark and back to 10 mark in 3 sec its average speed

Answer 1

Answer:

average speed = 4 m/s

Explanation:

average speed= total distance travelled/ time

distance travelled from 2m mark to 12 m mark = (12-2)m

= 10 m

distance travelled from 12m mark back to 10m mark = |( 10-12)|m

= 2 m (as distance cannot be negative)

total distance traveled = ( 2+10)m

= 12 m

average speed = ( 12/3) m/s

= 4 m/s (ans)

Answer 2

Answer:

4 m/s

Explanation:

a boy goes 2 m to 12 mits travel about (12-2) 10m

and then he travel back to 10 m to 12 m (12-10) 2m

in 3 sec

he travel about 12m (10+2)

average velocity = displacement/time

                            = 12/3

average velocity = 4 m/s