Shough948
Answered

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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.

Sagot :

Everest2017
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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