William Heathcote Solutions for Chapter: Movement, Exercise 4: Exercise 4

On earth, the acceleration of an object in free fall is $9.8 \mathrm{m} {\mathrm{s}}^{-2}$. How fast would an object be travelling after $3 \mathrm{s}$ of free fall if it started from rest?

A cheetah can accelerate from rest to $25 {\mathrm{ms}}^{-1}$ in only $2.5 \sec .$What is its acceleration? How does it compare to the acceleration it experienced if it fell out of a tree?

On ${\mathrm{I}}_{\mathrm{o}}$(a moon of Jupiter) the acceleration of free fall is $1.8 {\mathrm{ms}}^{-2}$. After $3 \mathrm{s}$ of free fall, how fast would an object be travelling if it starts from rest.