A car accelerates uniformly at a rate of 2.8 m/s^2. How long does it take for the car to accelerate from a speed of 12.7 m/s to a speed of 19.3 m/s?

1 Answer
Junaid Mirza
May 20, 2018

#"2.36 s"#

Explanation:

Use equation of motion

#"v = u + at"#

Where

  • #"v ="# Velocity after time #"t"#
  • #"u ="# Initial velocity (at #"t = 0"#)
  • #"a ="# Acceleration of object

#"t" = "v – u"/"a" = "19.3 m/s – 12.7 m/s"/("2.8 m/s"^2) = "2.36 s"#

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