A model rocket’s height above the ground is s(t)=50t2 metres, where t is the elapsed time in minutes. Determine its instantaneous acceleration at t=2 minutes, giving the answer in m/s2. (Use 1 minute = 60 seconds.)
a) 1.67m/s2
b) 0.0556m/s2
c) 0.028m/s2
d) 0.00028m/s2