Question

A block is pulled 0.90 m to the right in 2.5 s.

Answer 1

The block’s average speed : 0.36 m/s

Further explanation

Distance is the length traveled by an object within a certain of time .  

Average speed = total distance/total amount of time ,

Can be formulated :

$\tt avg.s(speed)=\dfrac{\Delta D}{\Delta t}$

ΔD= total distance

Δt= total time

A block is pulled 0.90 m to the right in 2.5 s :

ΔD= total distance = 0.9 m

Δt= total time = 2.5 s

The block’s average speed :

$\tt avg.s=\dfrac{0.9}{2.5}=0.36~m/s$