Question

If you push a 1000 kg box so in 2 seconds its velocity changes from 5m/s to 10 m/s how much force do you have to apply?

Answer 1

Answer:

  Force required to change velocity = 2.5 kN

Explanation:

 Force required = Mass of box x Acceleration of box

 Acceleration of box = Change in velocity of box / Time.

 Mass of box, m=   1000 kg

 Acceleration of box, a = (10 - 5)/2 = 5/2

                                       = 2.5 m/s²

  Force required = ma

                             = 1000 x 2.5 = 2500 N = 2.5 kN

  Force required to change velocity = 2.5 kN