A racing car initially at rest accelerates at uniform rate of 5.5 m/s2 for 10s.Calculate: (1)distance covered by racing car from start (2) final velocity in km/h?

1 Answer
Mar 20, 2018

#1. "275 m"#

#2. "198 kmph"#

Explanation:

1. Distance covered by racing car from rest

#"S" = "ut" + 1/2\ "at"^2#

#"S" = ("0 m/s × 10 s") + (1/2 × "5.5 m/s"^2 × ("10 s")^2) = color(blue)"275 m"#


2. Final Velocity

#"v = u + at"#

#"v" = "0 m/s" + ("5.5 m/s"^2 × "10 s") = "55 m/s"#

#(55 cancel"m")/cancel"s" × (3600 cancel"s")/"1 hour" × "1 km"/(1000 cancel"m") = color(blue)"198 km/hr"#