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

2 Answers
Apr 17, 2018

Answer:

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

Explanation:

#"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#

Apr 18, 2018

Answer:

#7 \ "m/s"^2#

Explanation:

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#