3. A sled is initially given a shove up a frictionless 23.0° incline. It reaches a maximum vertical height 1.22 m higher than where it started at the bottom. What was its initial speed?

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

and making v the subject of the formula then 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

the five characteristics of adolescence are biological growth and development, and undefined status, increased decision making, increased pressure and the search of self.

float.

archimedes' principle

denser than water sinks in water.

denser than mercury would sink in it