A helicopter’s speed increases from 25 m/s to 60 m/s in 5 seconds. What is the acceleration of this helicopter?

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Answer 1 · 2018-04-17T22:43:27

The answer is #"7 m/s"^2#.

#"Acceleration"# #= ("final speed " - " initial speed")/"time"#

So

#a = ("60 m/s " - " 25 m/s") / "5 s"#

#a = "35 m/s" / "5 s"#

#a = "7 m/s"^2#

Answer 2 · 2018-04-18T00:24:27

#7 \ "m/s"^2#

We use the basic kinematics equation,

#v=u+at#

#u# is the initial velocity of the object

#a# is the acceleration of the object

#t# is the time taken

Rearranging for #a#, we get:

#a=(v-u)/t#

#v# is the final velocity of the object

And so,

#a=(60 \ "m/s"-25 \ "m/s")/(5 \ "s")#

#=(35 \ "m/s")/(5 \ "s")#

#=7 \ "m/s"^2#