Afriend tells you that he/she has invented a 15 horsepower engine that can propel a car the size of a honda accord at freeway speeds. is this possible?

Could someone . i have tried to solve myself but my calculation is off

Tall pacific coast redwood trees can reach heights of about 100 m. if air drag is negligibly small, how fast is a sequola cone moving when it reaches the ground f it dropped from the top of a 100 m tree?

During which interval are the persons represented by the graph not moving? a) 0 to 0.5 hrs b) 1.5 to 2 hrs c) 2 to 2.5 hrs d) 4.5 to 5 hrs