Solution - The force needed is to be calculated by using the relation :
Force = mass * acceleration F = m * a
Force, F = ? ( To be calculated) Mass, m = 6 Kg
Acceleration, a = 4 m/s2
Now putting the value in above equation, we get
F = 6 * 4
Force, F = 24 N , Thus the force needed is of 24 newtons.