Shough948 Shough948

12-08-2014
Physics

Answered

A car advertisement states that a certain car can

accelerate from rest to 70km/h in 7 seconds.

Find the car’s acceleration in m/s.

Verified Answer :

Everest2017 Everest2017

12-08-2014

Acceleration is defined as change in velocity divided by time duration.

70 kmph = 70 1000 meter / 3600 sec = 175/9 meter / sec

Acceleration = [ 175/9 - 0 ] m/sec /    7 sec
   = 175 / (9 7) = 25/9 m/sec²
   = 2.77 meters/ sec²

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