Question

a ship is moving at a speed of 56 kilometre per hour 1 second later it is found to be moving at 58 kilometre per hour what is the acceleration of the ship

Answer 1

Answer:

Given:

Method I:

Initial speed=u=56km/h=56 x 5/18=15.55m/s

Final speed=v=58km/h=58x5/18=16.11m/s

Time=t=1sec

acceleration=a=?

as we know that acceleration is rate of change of velocity.

a=(v-u)/t

=(16.11-15.55)/1

=0.56 m/s²

Method 2:

Initial speed=u=56km/h

Final speed=v=58km/h

Time=t=1/60x60 h

acceleration=a=?

as we know that acceleration is rate of change of velocity.

a=(v-u)/t

=(58-56)/1/60*60

=2x3600

=7200 Km/h²

∴ Acceleration is 0.56 m/s² or 7200 Km/h²