Answer:
4.88 m/s
Explanation:
Utilizing the law of conservation of energy, kinetic energy at the inclined bottom equals to the potential energy at the top hence
[tex]0.5mv^{2}=mgh[/tex] and making v the subject of the formula then [tex]v=\sqrt {2gh}[/tex] where m represnt the mass of sled, v is the initial speed, g is acceleration due to gravity and h ia the vertical height. Substituting g with 9.81 m/s2 and h with 1.22 then
[tex]v=\sqrt{2\times 9.81\times 1.22}\approx 4.88 m/s[/tex]
