A machine accelerates a 5 kg missile from rest to a speed of 5 km/s. The net force accelerating the missile 500,000 N. How long does it take to arrive at the speed of 5 km/s?
Final velocity = 5km/sec = 5000 m/sec Initial velocity = 0, mass = 5kg and force = 500,000 N F = m(Vf-Vi)/time Time = m(Vf-Vi)/force = 5*5000/500000 = 0.05 seconds So, it takes 0.05 sec to arrive at the speed of 5km/s
