Question

List the following items in order of decreasing speed, from greatest to least: (A) A wind-up toy car that moves 0.10 m in 2.5 s . (B) A soccer ball that rolls 2.5 m in 0.55 s . (C) A bicycle that travels 0.60 m in 7.5×10−2 s .(D) A cat that runs 8.0 m in 2.5 s . Enter your answer as four letters separated with commas.

Answer 1

Answer:

bicycle>soccer ball>cat>toy car

Explanation:

s = Distance

t = Time

Speed is given by

$v=\dfrac{s}{t}$

For toy car

$v=\dfrac{0.1}{2.5}=0.04\ m/s$

For soccer ball

$v=\dfrac{2.5}{0.55}=4.54\ m/s$

For bicycle

$v=\dfrac{0.6}{7.5\times 10^{-2}}=8\ m/s$

For cat

$v=\dfrac{8}{2.5}=3.2\ m/s$

8>4.54>3.2>0.04

bicycle>soccer ball>cat>toy car