Question

A ship moves at a speed of 56km/h. One second later,is moving at 58km/h. What is the acceleration in m/s2

Answer 1

Given t = 1 sec.

Given u = 56 km/hr = 56 * 5/18

                                 = 15.56 m/s.

Given v = 58 km/hr = 58 * 5/18

                                = 16.11.


We know that Acceleration a = (v-u)/t

                                                  = 16.11 - 15.56

                                                  = 0.55 m/s^2.

Answer 2

58km/h=58*(5/18)m/s - eqn1
56km/h=56*(5/18)m/s - eqn2
accln.= (eqn1 - eqn2)/time
= 2*(5/18)....(as time is 1sec)
= 5/9m/s2
accln.= 0.5556m/s2.